ACO Building Drainage Watertight Rainwater Outlets For flat

Transcription

Uniclass
L73144
CI/Sf6 S2
(52.5)
X
ACO Building Drainage watertight rainwater outlets for flat roofs and other areas
Product Catalogue and Specifiers Design Guide
Watertight Rainwater Outlets
Product Catalogue
ACO Building Drainage
Our built environment is becoming ever
more complex. Applications are becoming
more sophisticated and the increasing
pressure of regulations and standards
make achieving design, performance and
financial goals ever tougher. ACO Building
Drainage is a new concept within the
ACO Group. Our mission: to eliminate
design risk, to reduce installed and life
cost and to deliver exceptional finish and
performance in every product application.
We achieve this through three factors:
High performance materials
Design experience and project support
Global manufacturing capacity
Our global resources and fabrication
capacity make it possible for us to deliver
best value, both with our standard
products and with our bespoke designs.
Confidence is further assured with quality
systems that are in accordance with ISO
9001-2000.
ACO Building Drainage’s extensive
portfolio includes:
ACO Building Drainage is a division of
ACO Technologies plc and part of the
worldwide ACO Group. The Group has
sales in excess of £300 million
worldwide with production facilities in the
UK, Germany, France, Switzerland,
Denmark, Spain, Poland, Czech Republic,
Australia and the USA. In total more than
3000 people are employed in 30
countries throughout the world.
Stainless steel Modular Channel
Tel:
system
Stainless steel Shower Channel
systems
Stainless steel EuroGully gully system
Stainless steel and polymer composite
access covers
Biological Grease Management system
Gravity Grease Separator system
Anti-flood protection valves
Stainless steel socketed pipe system
Galvanised steel socketed pipe system
Rainwater outlets for flat roofs
2
01462 816666
Fax:
01462 851490
e-mail Enquiries:
buildingdrainage@aco.co.uk
website:
www.acobuildingdrainage.co.uk
Introduction
Flat Roofs
The Need for Rainwater Outlets
Contents
Over the past few years, there have been
major advances and improvements in the
materials used in modern roofing
technology. The specifier now has
renewed confidence to take full advantage
of the benefits of a flat roof and low
pitched roof design concept.
Any flat area needs careful design to
ensure efficient removal of surface water.
Traditionally, water from a flat roof or
other structure is channelled by way of a
slope to a rainwater pipe. Leaks can often
occur at the junction of the membrane
and the rainwater pipe.
Design Considerations
Flat roofs allow greater planning and
design flexibility - roof-top gardens,
terracing, patios, car parks, building
services and ventilation equipment,
delivery areas and provision for adding
additional storeys at a later date. All can
be accommodated in a flat roof design.
To overcome this potential problem,
ACO Building Drainage rainwater outlets
provide a watertight joint between the
membrane and the outlet by
mechanically clamping the membrane to
the sump unit. Tried and tested for over
40 years, ACO Building Drainage outlets
have been used successfully on all types
of flat roof construction.
Extensive or irregular shaped buildings
can be roofed more quickly, easily and
cost effectively than a pitched roof.
Hydraulic Design Consideration
4
Effective Catchment Area of Roofs
5
Product Ranges
Index To HP Ranges
7
HP (High Performance) Range
8
Appendices
Index To Appendices
23
Appendix 1 Material Selection
24
Appendix 2 Typical Roof Construction 25
Internal condensation is less of a risk
because a flat roof uses less airspace
than a pitched roof. In addition, the need
to heat and illuminate voids is eliminated.
Appendix 3 Installation Guidelines
30
Flat roofs allow easy access to natural
light and because of the simple
construction, internal partitioning is easy.
This is especially advantageous for
commercial or industrial buildings.
HP (High Performance) range of outlets provides
rainwater drainage solutions for a wide range of
applications.
3
Product Catalogue
Design Considerations
HYDRAULIC DESIGN CONSIDERATIONS
Overview
Geographical Location
Flow Rate Calculation
The following notes are intended as a
guide to the specifier who is designing a
rainwater drainage system for a roof. It is
recommended that reference is made to
British Standard BS EN 12056 : 2000
Gravity Drainage Systems Inside Buildings
- Part 3 : Roof drainage, layout and
calculation for a comprehensive design
guide.
Rainfall intensity has a direct impact on
the performance requirements of any
rainwater drainage system. For roofs and
paved areas, it is normally impracticable
to guard against very infrequent,
extremely heavy rainfall situations and so
the designer should aim to strike a
balance between the cost of the drainage
system, the risk category of the building
and the frequency and subsequent
consequences of flooding.
The flow rate Q, from roofs, paved areas
and vertical walls and surfaces is
calculated as follows and assumes that
all surfaces are impermeable:
The drainage system for roofs and paved
areas should be capable of coping with
the intense rainfall that accompanies
summer thunderstorms.
I = Rainfall intensity (75 mm/hr)
For any rainwater drainage system to
work effectively and reliably, due account
must be taken of the following
considerations:
Geographical location
Rainfall intensity
Effective catchment area of roof
Risk category of building
Hydraulic capacity of the drainage
system(s) employed
The UK experiences complex and varied
rainfall patterns. For example,
surprisingly, although the upland areas of
northern and western parts of the British
Isles experience higher average annual
rainfall than the lowland areas, the
lowland areas experience more frequent
and more intense short duration rainfall
than the upland areas. British Standard
BS EN 12056 : 2000 may be referred to
for further information and guidance on
this topic.
A rainfall intensity of 75 mm/hr (0.02 l/s/
m2) is used throughout this design
catalogue.
4
Q = A x I litres/second
3600
where
Q = Volumetric flow rate (l/s)
A = Effective catchment area (m²)
EFFECTIVE CATCHMENT AREA OF ROOFS
Pitched Roofs
Flat Roofs & Paved Areas
The effective catchment area of a freely
exposed pitched roof draining to an eaves
or parapet wall gutter is equal to the plan
area of the roof plus half its maximum
elevation area.
For a monopitch flat roof or paved area
with a freely exposed horizontal surface,
the effective catchment area is equal to
the plan area of the area to be drained as
shown below:
Figure 1. Pitched Roof
Figure 2. Monopitch Flat Roof
Plan
l
a
g
b
Catchment area B
f
Catchment Area B = a x b (m²)
All linear dimensions in metres.
Catchment area A
Catchment Area A = (f x l) + (g/2 x l) (m²)
= l(f + g/2) (m²)
Figure 3. Dual Pitch Flat Roof
Catchment area C
c
5
d
e
Catchment area D
For a flat roof with a dual pitch, split the roof up
into discrete areas to isolate the catchment areas
as follows:
Catchment Area C = c x d (m²)
Catchment Area D = c x e (m²)
Product Catalogue
EFFECTIVE CATCHMENT AREA OF ROOFS
Adjacent Vertical Surfaces
Flat roofs or paved areas that are adjacent
to vertical walls and/or glazed surfaces will
be subjected to an increased hydraulic
load due to the effects of wind driven rain
against these vertical surfaces and
subsequently running off onto the roof.
For a flat roof exposed to a single wall as
shown in Figure 4, assume the effective
catchment area to be half the exposed
vertical area of the wall and is shown as
follows:
Similarly, for a flat roof exposed to two or
more vertical walls forming an angle or
bay, the assumed resulting wind direction
requires that the combined areas of the
walls should be considered together as
follows:
Figure 5 Monopitch Flat Roof with Two Adjacent
Vertical Walls
Catchment area E
even though only one outlet may be
required.
Rainwater outlets should be
Catchment area E
h
H
H
b
Catchment area B
Roof Catchment Area B = a x b (m²)
Vertical Wall Catchment Area E = a x H/2 (m²)
Vertical Wall Catchment Area F = b x h/2 (m²)
Total Catchment Area = (a x b) + ½√
(E²+ F² - 2F x Cos θ) (m²)
All linear dimensions in metres; angles in degrees.
b
Catchment area B
From Figure 2, Catchment Area B = a x b (m²)
Vertical Wall Catchment Area E = a x H/2 (m²)
Total Catchment Area = (a x b) + (a x H/2) (m²)
6
Do not design for the maximum
Always allow for a back-up outlet,
Figure 4. Monopitch Flat Roof with One Adjacent
Vertical Wall
a
When designing an engineered rainwater
scheme, the following design hints are
suggested:
outlet hydraulic capacity, allow a
10% factor of safety margin for
intense storms and leaf/debris
blockage.
a
Catchment area F
Practical Design Tips
inspected and cleaned at least every
6 months to ensure reliable and
continuous operation.
Product Ranges
HP (High Performance) Range
The extensive range of products included
in the ACO Building Drainage HP (High
Performance) range of outlets provides
rainwater drainage solutions for a wide
range of applications.
Index to HP Ranges
Description
8
Product Features
8
HP Vertical Spigot Oulet - Dome Grate 11
HP Range Accessories
9
Key features of this high quality product
range include advanced grating geometry
increasing the flow of water through the
outlet compared to conventional units
and secure gratings to prevent vandalising
and theft.
HP Range Product Selector
HP 45° Spigot Outlet
14
The ACO Building Drainage HP range
provides a high performance, cost
effective, high quality solution for most
rainwater applications.
HP 90° Spigot Outlet
15
HP Balcony Spigot Outlet
16
HP Two-Way Screw Outlet
17
HP Gully Spigot Outlet
18
HP Refurbishment Outlet
19
20
10
HP Vertical Spigot Outlet - Flat Grate 12
HP Vertical Screw Outlet
13
A wide range of outlet sizes and
configurations are available: 50 mm, 75
mm, 100 mm and 150 mm.
7
Product Catalogue
HP Range
Reduced Installation Costs
Description
Compared to conventional outlets, high
performance outlets mean either fewer
outlets/pipe/groundworks with reduced
installation costs, or greater security in
extreme rainfall conditions.
The ACO Building Drainage HP range of
rainwater outlets provides a
comprehensive selection of high
performance rainwater outlet solutions for
most domestic, industrial and commercial
applications involving flat roofs, balconies
and terracing.
Secure Gratings
High Flow Rate
Product Features
Cost effective drainage solution - high
flow rates minimises number of
outlets required.
Secure grating to prevent vandalism
and theft.
Comprehensive product range for
Advanced design features encourage a
higher flow rate of water through the
outlet compared to conventional systems
by reducing the amount of air that is
drawn into the outlet. If allowed to go
unchecked, a vortex will form as the
water enters the outlet - the same effect
can be seen in the bath or a sink when
the plug is removed.
most applications.
Durable, corrosion resistant
construction.
Gun-metal optionally available.
At the centre of the vortex, a void is
naturally formed as the water spirals
through the outlet. Under these
conditions, both water and air are drawn
into the outlet significantly reducing
efficiency. For maximum flow rate
efficiency, only water should enter the
outlet. This may result in the use of fewer
outlets for a given installation.
8
The ACO Building Drainage HP range of
outlets provide anti-vortex design features
to minimise this effect and a twofold
design approach is adopted to achieve
this. On all circular domed gratings an
inverted cup arrangement is integrated
within the grating to breakdown the vortex
effect within the grating and in addition,
the leaf guard geometry of the gratings is
optimised to encourage water to flow
radially into the outlet, thereby minimising
the vortex effect outside of the grating.
All gratings for the HP range of products
are secured with stainless steel fixings
that require either a socket wrench or
spanner for removal and replacement.
This provides additional security to
prevent theft or vandalism.
Membrane Clamp
The roof membrane is positively secured
into the outlet body by a clamp and is
secured by 2 stainless steel fixings. The
membrane clamp is serrated on the
underside for improved membrane clamp
grip performance. The outlet design
ensures the integrity of the seal between
the clamp and body is not disturbed
when the grating is removed for
maintenance during the life of the
installation.
Materials
All products are manufactured from LM6
grade aluminium alloy to BS 1490 as
standard for optimum corrosion
resistance.
A wide range of accessories are available
for the ACO Building Drainage HP range
including raising rings, PVC connectors,
terrace grates and deck support plates.
See Pages 16-22 for details.
Options
Gun-metal to BS 1400 available to
special order. Gun-metal should be
specified for use in conjunction with
copper or lead-clad roofs or when
connected to copper pipes. Refer to
Appendix 1 for further information.
Suffix Sales Code with ‘GM’ for this
option for example, 2HP-D GM.
Gratings and clamp rings can be
provided to suit corporate colour
schemes and coding as required.
Pipe Connections
Refer to Appendix 4 for details of the full
range of flexible pipe connection
couplings that are available from ACO
Building Drainage.
For further details of any options, contact the
ACO Building Drainage Sales Desk for more
information.
9
Product Catalogue
HP Range
Product Selector
HP Vertical Spigot Outlet
HP 45° & 90° Spigot Outlets
HP Gully Spigot Outlet
General purpose rainwater outlets suitable
for direct connection to cast iron
pipework to BS 416 : 1983/EN 877 or
to PVC ‘O’-ring socket pipe to BS 4514 :
1983. Other connections can be made
using ACO Building Drainage flexible
couplings or heat shrink sleeving. Vertical
spigot outlets are available with either
domed or flat gratings. Flat gratings are
used where either vehicles or pedestrian
traffic is likely.
These angled problem solving units are
particularly relevant to suit more complex
pipe run detail. Pipework connections as
per vertical spigot details.
The gully outlet is designed to fit into
valley gutters and is supplied with a
vertical spigot outlet and dome grating.
Pipework connections as per vertical
spigot details.
HP Balcony Spigot Outlet
HP Refurbishment Outlet
HP Vertical Screw Outlet
10
Screwed outlets are recommended where
connection to the outlet occurs within the
thickness of the slab and threaded
connections will form a completely gastight seal.
Vertical screw outlets have a female
parallel thread to BS 21 : 1985 for
connecting directly to tubes conforming to
BS 1387 : 1985 which is supplied with
a taper male thread. This ensures a
completely watertight seal when screwed
fully home into the outlet body. A range
of PVC adaptors are available from ACO
Building Drainage to allow connection to
aluminium pipework, socketed and
socketless cast iron pipework and PVC
pipework.
The balcony outlet provides discrete safe
drainage for balconies and walkways.
Supplied complete with a D-shaped flat
grating, the outlet can be installed against
a wall. The grating is supplied with holes
to receive either 50 mm, 75 mm or 100
mm nominal bore rainwater downpipes.
These are easily cut on site to suit the
application.
HP Two-Way Screw Outlet
The two-way outlet is designed to be
used at the junction of roofs and parapet
walls, or wherever a horizontal and
vertical surface meet. Available to fit pipe
sizes of 50 mm, 75 mm and 100 mm.
This flexible design of outlet allows either
horizontal or vertical outflow take-off.
Pipework connections as per vertical
screw details.
When an existing flat roof is being
upgraded, the refurbishment outlet is
designed to fit inside the existing outlet
and pipework with minimal disruption
without the need to remove the original
outlet. The aluminium body incorporates
a wide fixing flange to enhance the bond
with roofing membranes and does not
suffer the distortion effects during the
application of torched membranes.
Outlets are supplied with a flexible finned
pipe seal ensuring a watertight
connection to existing pipework. The ease
of use and minimal disruption to the
existing rainwater system makes this an
extremely cost effective solution when
upgrading flat roofs.
HP Vertical Spigot Outlet - Dome Grate
Technical Information
Product Code
Nominal Bore Pipe
Size (mm)
Part Number
Flow Rate† (l/s)
Area Drained‡ (m2)
Weight (kg)
2HP-D
50
17001
1.7
81
2.39
3HP-D
75
17004
5.0
240
2.49
4HP-D
100
17007
10.7
514
4.23
6HP-D
150
17010
14.1
675
4.67
† Based on a 35 mm head of water over the outlet body.
‡ Based on a rainfall intensity of 75 mm/hr.
Flow rates based on BS EN 12056 : 2000.
Physical Dimensions
A
B
Membrane
C
D
E
Dimension
2HP-D
3HP-D
4HP-D
6HP-D
A
292
292
380
380
B
233
233
305
305
C
196
196
244
244
D
98
108
122
145
E
60
83
110
160
Specification Clause
11
The rainwater outlets 2HP-D/3HP-D/
4HP-D/6HP-D* are to be ACO Building
Drainage HP vertical spigot outlets with
locked dome grating supplied by ACO
Building Drainage (a division of ACO
Technologies plc), of Hitchin Road,
Shefford, Bedfordshire, UK, SG17 5TE.
All dimensions in mm.
Pipework Connections
Vertical spigot outlets may be directly
connected to the following:
Cast iron pipework to BS 416:1973
or EN 877.
PVC ‘O’-ring socketed pipe to BS
4514 : 1985 (for 3HP-D, 4HP-D
and 6HP-D outlets only).
Connection to 2HP-D units via heat
shrink socket or pipe couplings.
All components to be manufactured from
grade LM6 aluminium alloy to BS 1490/
gun-metal to BS EN 1982*.
All components used within the scope of
this system are shown on Drawing No. *
and all work shall be carried out strictly
in accordance with the manufacturers
instructions and the installation details
are set out on Drawing No. *.
* please delete or complete as appropriate.
Product Catalogue
HP Vertical Spigot Outlet - Flat Grate
Product Code
Nominal Bore Pipe
Size (mm)
Part Number
Flow Rate† (l/s)
Weight (kg)
2HP-F
50
17002
1.7
81
2.51
3HP-F
75
17005
5.0
240
2.65
4HP-F
100
17008
10.7
514
4.08
6HP-F
150
17011
15.6
749
4.39
Physical Dimensions
A
B
Membrane
C
D
E
12
Dimension
2HP-F
3HP-F
4HP-F
6HP-F
A
292
292
380
380
B
233
233
305
305
C
196
196
244
244
D
98
108
122
145
E
60
83
110
160
The rainwater outlets 2HP-F/3HP-F/
4HP-F/6HP-F* are to be ACO Building
Drainage HP vertical spigot outlets with
locked flat grating supplied by ACO
Vertical spigot outlets may be directly
or EN 877.
4514 : 1985 (for 3HP-F, 4HP-F and
6HP-F outlets only).
Connection to 2HP-F units via heat
HP Vertical Screw Outlet - Dome Grate
Product Code
Nominal Bore Pipe
Size (mm)
Part Number
Flow Rate† (l/s)
Weight (kg)
2HP-TD
50
17003
1.7
81
2.29
3HP-TD
75
17006
5.0
240
2.32
4HP-TD
100
10779
10.7
514
4.03
6HP-TD
150
17012
13.5
648
4.13
Physical Dimensions
A
B
Membrane
C
D
Dimension
2HP-TD
3HP-TD
4HP-TD
6HP-TD
A
292
292
380
380
B
234
234
305
305
C
121
121
133
144
D
35
45
38
38
13
The rainwater outlets 2HP-TD/3HP-TD/
4HP-TD/6HP-TD* are to be ACO Building
Drainage HP vertical screw outlets with
Vertical screw outlets have a female
parallel thread to BS 21 : 1985 for
connecting directly to tube conforming to
BS 1387 : 1985 which is supplied with
a taper male thread. This ensures a
completely watertight seal when screwed
fully home into the outlet body.
connections will form a completely gastight seal within the slab.
Refer to HP Accessories section for
details of ABS adaptors that are available
from ACO Building Drainage.
Product Catalogue
HP 45° Spigot Outlet - Dome Grate
Product Code
Nominal Bore Pipe
Size (mm)
Part Number
Flow Rate† (l/s)
Weight (kg)
245HP-D
50
17013
1.7
81
3.34
345HP-D
75
17014
5.0
240
3.77
445HP-D
100
17015
10.7
514
4.81
Physical Dimensions
A
B
Membrane
C
E
14
D
Dimension
245HP-D
345HP-D
445HP-D
A
305
305
372
B
229
229
305
C
229
235
273
D
175
175
191
E
62
87
114
The rainwater outlets 245HP-D/345HPD/ 445HP-D* are to be ACO Building
Drainage HP 45° spigot outlets with
45° spigot outlets may be directly
or EN 877.
Connection to PVC pipework via heat
HP 90° Spigot Outlet - Dome Grate
Product Code
Nominal Bore Pipe
Size (mm)
Part Number
Flow Rate† (l/s)
Weight (kg)
290HP-D
50
17016
1.7
81
3.57
390HP-D
75
17017
3.3
171
3.61
490HP-D
100
17018
7.2
336
4.69
Physical Dimensions
A
B
Membrane
C
E
D
Dimension
290HP-D
390HP-D
490HP-D
A
305
329
405
B
229
229
305
C
124
121
142
D
232
267
285
E
62
83
110
15
The rainwater outlets 290HP-D/390HPD/ 490HP-D* are to be ACO Building
Drainage HP 90° spigot outlets with
90° spigot outlets may be directly
or EN 877.
4514 : 1985 (for 390HP-D and
490HP-D outlets only).
Connection to 290HP-D via heat
Product Catalogue
HP Balcony Spigot Outlet - Flat Grate
Product Code
Nominal Bore Pipe
Size (mm)
Part Number
Flow Rate† (l/s)
Weight (kg)
2HP-BO
50
17019
1.7
81
2.58
3HP-BO
75
17020
5.0
240
2.71
4HP-BO
100
17021
8.4
403
2.77
Physical Dimensions
A
Membrane
242
B
C
E
D
G
186
F
16
Dimension
2HP-BO
3HP-BO
4HP-BO
A
270
270
270
B
205
205
205
C
52
52
52
D
125
125
125
E
235
235
235
F
180
180
180
G
60
83
110
Balcony outlets may be directly
or EN 877.
4514 : 1985 (for 3HP-BO and 4HPBO outlets only).
Connection to 2HP-BO units via heat
The rainwater outlets 2HP-BO/3HP-BO/
4HP-BO* are to be ACO Building
Drainage HP Balcony spigot outlets with
HP Two-Way Screw Outlet - Flat Grate
Flow Rate† (l/s)
Product Code
Nominal Bore
Pipe Size (mm)
Part Number
Vertical Outflow
Horizontal
Outflow
Vertical Outflow
Horizontal
Outflow
Weight (kg)
2HP-2W
50
17022
1.7
1.7
81
81
2.14
3HP-2W
75
17023
3.9
1.5
189
93
2.22
4HP-2W
100
17024
6.0
2.0
288
110
2.23
Physical Dimensions
E
Membrane
A
D
F
B
C
Dimension
2HP-BW
3HP-BW
4HP-BW
A
204
204
204
B
70
70
70
C
191
191
191
D
214
214
214
E
50
50
50
F
45°
45°
45°
Overall Length
225
225
225
Two Way outlets have a female parallel
thread to BS 21 : 1985 for connecting
directly to tube conforming to BS 1387 :
1985 which is supplied with a taper
male thread. This ensures a completely
watertight seal when screwed fully home
into the outlet body.
connections will form a completely gastight seal within the slab.
Refer to HP Accessories section for
details of ABS adaptors that are available
from ACO Building Drainage.
17
The rainwater outlets 2HP-2W/3HP-2W/
4HP-2W* are to be ACO Building
Drainage HP Two-Way screw outlets with
Product Catalogue
HP Gully Spigot Outlet - Dome Grate
Product Code
Nominal Bore
Pipe Size (mm)
Part Number
Flow Rate† (l/s)
Weight (kg)
3HP-GO
75
17025
5.0
240
3.89
4HP-GO
100
17026
10.4
500
4.02
Physical Dimensions
A
B
Membrane
C
D
E
18
Dimension
3HP-GO
4HP-GO
A
228
228
B
188
188
C
251
251
D
130
130
E
83
110
Overall Length
334
334
Gully outlets may be directly connected to
the following:
or EN 877.
4514 : 1985.
The rainwater outlets 3HP-GO/4HP-GO*
are to be ACO Building Drainage HP
Gully outlets with locked dome grating
supplied by ACO Building Drainage (a
division of ACO Technologies plc), of
Hitchin Road, Shefford, Bedfordshire,
UK, SG17 5TE.
HP Refurbishment Outlet - Dome Grate
Product Code
Nominal Bore
Pipe Size (mm)
Part Number
Flow Rate† (l/s)
Weight (kg)
3HP-RFO
75
17027
5.0
240
5.00
4HP-RFO
100
17028
5.0
240
5.10
Physical Dimensions
A
B
Membrane
C
D
E
F
G
Dimension
3HP-RFO
4HP-RFO
A
456
456
B
304
304
C
346
346
D
266
266
E
63.5
88.9
F
95
120
G
205
205
19
The rainwater outlets 3HP-RFO/4HPRFO* are to be ACO Building Drainage
HP Refurbishment outlets with locked
dome grating supplied by ACO Building
Drainage (a division of ACO Technologies
plc), of Hitchin Road, Shefford,
Bedfordshire, UK, SG17 5TE.
Refurbishment outlets are designed to fit
the following range of existing pipework
systems:
3HP-RFO : 71.5 to 78.5 mm internal
pipe diameter.
4HP-RFO : 97.0 to 104.0 mm
internal pipe diameter.
Product Catalogue
A wide range of accessories is available
for the ACO Building Drainage HP range
of rainwater outlets allowing easy
installation in common and not so
common applications of roof construction,
including warm and inverted roofs,
terraces and concealed outlets under
raised paving slabs.
PVC Adaptors
Terrace Grates
PVC adaptors are available for threaded
outlets - HP Vertical Screw (HP-TD); and
HP Two-Way (HP-2W) systems. ABS
adaptors provide a quick and convenient
connection to PVC and cast iron
pipework.
Terrace grates are designed for
installations with terraced paving slabs or
block paviors. Terrace grates can only be
used with circular raising rings as
described above. A slotted fixing detail
allows 90° rotational movement to
accommodate slab/pavior patterns.
Raising Rings
Raising rings are used where it is
necessary to raise the level of the dome
grating above the outlet body, for example
an inverted roof construction. With the
exception of the Balcony Outlets (HP-BO)
and Gully Outlets (HP-GO), raising rings
will only accept dome gratings or Terrace
Grates as the raising rings will not accept
the standard flat grates.
The adaptors are suitable for connection
to all types of pipe systems including cast
iron socketed or socketless systems and
are assembled using PTFE tape to ensure
a watertight connection. Manufactured
from tough ABS, the adaptors are
supplied with a male thread and
chamfered spigot for easy connection to
PVC pipes. ABS adaptors are suitable for
direct connection to:
Cast Iron pipework to BS 416:1973
or EN 877.
Raising rings are easily cut with a hacksaw
on site if required to match installation
requirements, i.e. to suit paving slabs.
Stainless steel extension fixings are
supplied with each raising ring.
20
PVC O-ring socketed pipe to
BS 4514:1983.
Raising rings are also available for Balcony
Outlets and Gully Outlets. All raising rings
are manufactured from LM6 aluminium
alloy to BS 1490 and are optionally
available in gun metal to BS 1400. Suffix
sales code with ‘GM’ for this option.
Deck Supports
Deck supports are used where ACO
Building Drainage HP rainwater outlets are
installed in metal deck roof constructions,
providing a stable and secure interface
between the outlet and roof. Deck
Supports are manufactured from 1.5 mm
steel sheet and finished primed in a red
oxide paint finish. Suitable for all types of
metal deck roofing.
HP Range Accessories - Raising Rings and Adaptors
Raising Rings for Circular
Outlets
A
Vertical Spigot, Vertical Screw, 45°
Spigot, 90° Spigot and Refurbishment
Outlets (dome grate only)
B
C
Outlet Model
Product Code
Part Number
A
B
C
Weight (kg)
2/3RR
17029
161
128
150
0.72
4/6RR
10730
233
128
222
1.14
2HP-D; 2HP-TD; 3HP-D; 3HP-TD; 245HP-D; 345HP-D;
290HP-D; 390HP-D; 3HP-RFO
4HP-D; 4HP-TD; 6HP-D; 6HP-TD; 445HP-D; 490HP-D;
4HP-RFO
Raising Rings for Balcony Outlets
Product Code
Part Number
A
B
Weight (kg)
17031
220
115
1.25
Part Number
A
B
Weight (kg)
17032
240
115
1.85
BO-RR
A
B
Raising Rings for Gully Outlets
21
Product Code
GO-RR
A
B
ABS Adaptors
L
Product Code
Part Number Male Thread Ø Outside Ø B
A (BSP)
(mm)
Length L
(mm)
Length l
(mm)
Weight
(kg)
2STC
15007
2”
57.0
305
148
0.33
3STC
15008
3”
82.0
305
148
0.55
4STC
15009
4”
110.5
305
148
1.12
6STC
15010
6”
160.0
305
148
2.25
Material : ABS.
I
B
Male thread A
Product Catalogue
HP Range Accessories - Deck Support and Terrace Grates
Deck Supports for Circular Outlets
Sales Code: 2/3DS
Outlet Model
335
2HP-D
Part No’s
Weight (kg)
Product Code
17033
1.97
2/3DS
17034
2.91
4/6DS
2HP-TD
3HP-D
3HP-TD
335
245HP-D
345HP-D
290HP-D
390HP-D
Sales Code: 4/6DS
4HP-D
415
4HP-TD
6HP-D
6HP-TD
445HP-D
490HP-D
415
3HP-RFO
4HP-RFO
Terrace Grates for Circular Outlet Raising Rings
22
Sales Code: 2/3 TG
Outlet Model
160
2HP-D
Part No’s
Weight
(kg)
Product Code
Appropriate Raising Ring
Sales Code (Ref.)
17035
0.70
2/3TG
2/3RR
17036
1.52
4/6TG
4/6RR
2HP-TD
3HP-D
3HP-TD
245HP-D
25
345HP-D
290HP-D
390HP-D
Sales Code: 4/6TG
4HP-D
232
4HP-TD
6HP-D
6HP-TD
445HP-D
490HP-D
3HP-RFO
4HP-RFO
25
Appendices
1. Material Selection
3. Installation Guidelines
Overview
24
General Installation Notes
30
Aluminium Alloys
24
Threaded Outlets
30
Gun-metal
24
Balcony Outlets
30
Galvanised Mild Steel
24
HP Circular Raising Rings
30
Galvanic Corrosion
24
Balcony/Gully Outlet Raising Rings
30
The Electromotive Series
24
Deck Supports
30
Material Selection Tips
24
Refurbishment Outlet
31
2. Typical Roof
Construction Detail
Warm Roof
25
Inverted Roof
25
Un-insulated Roof
26
HP 90° Outlet
26
Gully Outlet
27
27
Balcony Outlet with Downpipe
28
Two-Way Outlet
28
Terrace Grate
29
Metal Deck Support
29
23
Product Catalogue
Appendix 1 Material Selection
Overview
This section includes a brief insight into
the materials that the rainwater drainage
products featured in this Product
Catalogue and Design Guide are
manufactured from.
In certain applications, it is vital to
understand the long term operational
effects that will occur if products are not
specified accurately or installed correctly.
24
Titanium
304 Stainless Steel (passivated)
Silver
Nickel
Copper
Gun-metal
Lead
Cast Iron
Aluminium
Zinc
Magnesium
Aluminium Alloys
Gun-metal
Aluminium alloys are very common and
can be found in a wide range of
applications ranging from cooking utensils
to spacecraft. The material is
commercially available in excess of 99%
purity and is used primarily for its high
resistance to corrosion, lightness and
strength.
Gun metal possesses good tensile
strength and corrosion resistant properties
and is used in many bearing and marine
applications. ACO Building Drainage
rainwater outlets are available in gunmetal when bi-metallic corrosion
resistance arising from lead or copper
materials is a potential risk.
Comparing similar products, aluminium
alloys weigh around one-third as much as
equivalent mild steel and stainless steel
products and compared to mild steel,
they have a much better corrosion
resistance to atmospheric conditions.
Gun-metal is an alloy of copper, tin and
zinc. Admiralty gun-metal typically has a
composition of 88% copper, 10% tin and
2% zinc.
Because aluminium alloys are strong,
lightweight, have good corrosion
resistance, are cost effective and have
excellent casting properties, this material
is an obvious first choice for rainwater
outlets and floor gullies. Additionally,
being non-magnetic, aluminium will not
attract ferrous particles that could
otherwise cause silt traps and long term
maintenance issues.
ACO Building Drainage aluminium
rainwater outlets, shower drains and floor
drains use LM6 grade aluminium alloy to
BS 1490. LM6 exhibits excellent
resistance to corrosion in both
atmospheric and marine environments
compared to other aluminium alloys, and
is resistant to sulphate attack for curing
concrete.
When exposed to the atmosphere, a thin
invisible aluminium oxide film forms on
the surface of the material that protects
the material from further oxidation.
More noble - decreased corrosion
Less noble - increased corrosion
The Electromotive Series provides an
insight to the corrosion effects between
dissimilar materials.
The Electromotive Series
The susceptibility of different metals to
corrosion whilst in contact with each
other depends upon the difference
between the contact potentials. The
greater the potential difference, the
greater the tendency for corrosion. The
metal with the higher negative potential
forms the anode and is corroded
preferentially.
Galvanised Mild Steel
Some examples from the Electromotive
Series are shown opposite for illustration.
Mild steel is a convenient, ductile, easily
worked and cost effective material that
finds many uses in everyday applications
around us.
Material Selection Tips
In its raw state, mild steel offers no
resistance to corrosion and quickly forms
a familiar rust (ferric oxide) on its surface
unless precautions are taken to prevent
oxidation taking place.
Galvanising is a process that is commonly
used to prevent corrosion and essentially
consists of a layer of zinc applied to the
surface of the steel. ACO Building
Drainage use a ‘hot dip’ process of
dipping the component into a vat of
molten zinc.
Galvanic Corrosion
Galvanic corrosion occurs when two
dissimilar metals are in electrical contact
and connected by an electrolyte. An
electrolyte conducts electricity and can be
water solutions containing salts or acids and need not be concentrated for the
effect to take place.
The effects of galvanic corrosion begin to
play an important part when an
aluminium rainwater outlet is used in
conjunction with metallic membranes,
such as lead or copper.
For applications when dissimilar
materials are in contact with each
other wherever possible, select
materials to be as close as possible
to each other in the Electromotive
Series. For example, if a roof is
copper clad, select a gun-metal outlet
as gun-metal is around 88% copper,
this closely matches the cladding
material.
Where dissimilar metals cannot be
readily avoided, care must be taken
to electrically insulate the adjacent
materials. For example where lead is
dressed into an aluminium alloy
outlet, carefully paint the aluminium
body and clamp components with
good quality bitumen paint or use an
insulating gasket material such as
neoprene sponge. Ideally, a gun-metal
outlet should be used in conjunction
with lead clad roofs.
The effects of galvanic corrosion can
be accelerated in saline
environments. Caution should be
observed with rainwater outlet
applications close to coastal regions.
Appendix 2 Typical Roof Construction Detail
WARM ROOF
A warm roof is where the main mass of
the roof structure lies below the main
thermal insulation. The waterproof
membrane is positioned above the
insulation.
Reflective layer Clamping
of chippings
Ring
Vapour
Barrier
Two layer
mastic asphalt
Raising
Ring
Outlet
body
Secure bolted
grating
Rigid insulation
board
Structural
deck
Sand/cement
screed to falls
INVERTED ROOF
An inverted roof is a form of warm roof
where the main mass of the roof structure
lies below the main thermal insulation,
however, the waterproof membrane lies
beneath the thermal insulation.
Gravel
ballast
Clamping
ring
Raising
ring
Secure bolted
grating
Rigid insulation
board
25
Two layer mastic asphalt
on isolating membrane
Outlet
body
Structural deck
Sand/cement
screed to falls
Product Catalogue
UN-INSULATED ROOF
A roof without thermal insulation. This
type of construction is only permitted in
non-habitable buildings, e.g. garages.
HP 90° OUTLET
Three layer built up
felt roofing
Clamping
ring
Secure bolted
grating
Plywood
deck
Firring
piece
26
Insulation
Timber joist
Outlet body
Vapour barrier
Plaster
ceiling
GULLY OUTLET
Gunmetal
clamping
ring
Gunmetal
domical
grate
Sheet lead
gutter lining
Rigid
insulation
board
Timber spaces
in insulated gutter
Gunmetal
body
Ply base
Rigid
insulation
board
Timber
gutter
REFURBISHMENT OUTLET
Two layer high performance Secure bolted grating
felt layered onto vapour barrier
Clamping
ring
Timber
frame
Rigid
insulation board
27
Vapour barrier
PU insulation
port
PU expanded
foam insulation
Pipe seal
Existing
rainwater pipe
Structural
deck
Product Catalogue
BALCONY OUTLET WITH DOWNPIPE
Clamping
ring
Flat grating with
pipe cut-out
Outlet body
Two layer mastic asphalt
on isolating membrane
Structural deck
Sand/cement screed
to falls
TWO-WAY OUTLET
28
Grating
Screw thread
connector
Clamping ring
Structural deck
Reflective chippings on
three layer built up felt roofing
Vapour barrier
Rigid insulation
board
TERRACE GRATE
Rigid
insulation board
Structural deck
Paving slabs
ballasting
Raising
ring
Terrace
grate
Outlet body
Clamping
ring
Sand/cement
screed to falls
Paving slab
support
Two layer
mastic asphalt
METAL DECK SUPPORT
Three layer felt
Timber fillet
Secure bolted
grating
Clamping ring
Rigid insulation board with
integral vapour barrier to falls
29
Metal closure panel
Metal deck
Screwed outlet body
Deck support
Product Catalogue
Appendix 3 Installation Guidelines
General Installation Notes
Balcony Outlets
All outlets must be securely attached to
the roof structure using a suitable timber
frame or deck support. The waterproof
membrane must be fully dressed into the
outlet body and securely clamped under
the membrane clamp.
The flat grating is configured with an
array of eccentric grating slots that can
be readily cut on site with a hacksaw to
accommodate a downpipe.
Practical Design/Installation Tips
Do not design for the maximum
outlet hydraulic capacity, allow a
10% factor of safety margin for
intense storms and leaf/debris
blockage.
Always allow for a back-up outlet,
even though only one outlet may be
required.
Rainwater outlets should be
inspected and cleaned at least every
6 months to ensure reliable and
continuous operation.
Threaded Outlets
For all ACO Building Drainage threaded
outlets (HP Vertical Screw and Two-Way
outlets) are provided with female parallel
threads conforming to BS 21:1985 for
direct connection of threaded tube
conforming to BS 1387:1985. This tube
is supplied with a taper male thread
conforming to BS 21:1985, which
ensures a watertight joint when fully
screwed into the unit.
30
Threaded outlets are particularly
recommended where a connection to the
outlet is made within the thickness of the
concrete slab. In these applications, the
threaded connection creates a completely
watertight seal.
Where an ABS screw thread connector
(STC) is used in conjunction with
threaded outlets, the screw thread
connector should be assembled with
PTFE tape to ensure a watertight seal.
.
HP Circular Raising Rings
HP raising rings can be used for domed
grating outlets and terrace gratings only.
HP raising rings cannot be used with flat
gratings.
HP raising rings are secured with
stainless steel fixings that are supplied
with each raising ring product.
Where required, the HP raising rings may
be easily cut on site to a specific height
using a hacksaw (for example, when
using a terrace grate in conjunction with
paving slabs).
Balcony/Gully Outlet Raising Rings
Raising rings for balcony outlets and gully
outlets are available and perform a
similar function as the HP Circular raising
rings as previously described. Separate
stainless steel fixings are supplied with
each unit.
Deck Supports
ACO deck supports are recommended for
metal decked roof construction and are
suitable for installation on all types of
metal decked roofs. Deck supports have
pre-drilled holes for ease of fixing.
Refurbishment outlets are designed to
conveniently fit within the existing
rainwater outlet of the roof that is being
refurbished, which means there is no need
to remove the existing rainwater outlet.
Step 1
Step 5
Strip back all roof coverings to the deck
level. Clean out old outlet with wire brush
and flush with clean water.
Flush with clean water to lubricate and
insert tail pipe into existing pipework.
Seat flange on timber frame.
Step 2
Step 6
Form timber frame around old outlet and
lay insulation board/vapour barrier (35
mm minimum).
Screw flange to timber frame.
Refurbishment outlets incorporate a
high performance domed grating and
optimised tail pipe to maximise flow
through the unit. The labyrinth finned
seal ensures a watertight connection to
the existing pipework. Two sealable
access points within the body enable
PU foam to be injected to fill the void
between the old and new outlet.
Membrane
Step 7
Step 3
Inject PU foam through one port for 5
seconds. Remove any surplus.
Check clearance and trim tail pipe to
length with hacksaw if necessary.
31
Step 8
Step 4
Push on flexible labyrinth seal.
Blank off ports with captive screws.
Complete installation and
weatherproofing.
ACO Technologies plc
ACO Business Park,
Hitchin Road,
Shefford,
Bedfordshire
SG17 5TE
Tel: 01462 816666
Fax: 01462 815895
e-mail Sales: buildingdrainage@aco.co.uk
website: www.acobuildingdrainage.co.uk
© March 2008 ACO Technologies plc. All reasonable care has been taken in compiling the information in this document. All recommendations and suggestions on the use of ACO products are
made without guarantee since the conditions of use are beyond the control of the Company. It is the customer's responsibility to ensure that each product is fit for its intended purpose, and that
the actual conditions of use are suitable. This brochure and any advice is provided by ACO Technologies plc (the Company) free of charge and accordingly on terms that no liability including
liability for negligence will attach to the Company or its servants or agents arising out of or in connection with or in relation to this brochure or any such advice. Any goods supplied by the
Company will be supplied solely upon its standard conditions of sale, copies of which are available on request. The Company's policy of continuous product development and improvement renders
specifications liable to modification. Information provided in this brochure is therefore subject to change without prior notification.
PC20379

ACO Building Drainage Watertight Rainwater Outlets For flat

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