Hep20 Technical Handbook

Hep 2
O ® Design Considerations
Construction & Water Distribution
Hep 2 O ® Within Drylined
Walls
Feeds to radiators run in microbore
copper can be accommodated
behind ‘dot and dab’ plasterboard to
give a pipe-free appearance within
the room. Pipes run in 10mm
Hep 2 O ® are equally suited to this
application but will not be
susceptible to damage such as dents
or kinks which can be caused on
‘soft’ copper by following tradesmen.
The penetration through the
plasterboard for a radiator
connection can be achieved by using
a 10mm SlimLine Elbow (HX5/10)
together with a Fitting Clip
(HX84/10) or alternatively a dry
lining box can be used. See Figure 28
on page 78.
Another method when using 10mm
Hep 2 O ® Pipe is to utilise the
HX111 Cover Plate. The HX111
Cover Plate and Back Box (HX109
or HX110) allows for a superior and
easy to install method of connecting
radiators. The box is fixed in a
central position behind the radiator
with the 10mm pipes dropping out
to the radiator valves. This gives a
smart professional finish where little
or no pipe is seen and for new build
provides an anchor point for the
pipe work prior to
plastering/boarding.
The installation procedure for using
the HX111 Cover Plate, stages 1 to
4, is shown below and opposite.
1
2
The HX111 Cover Plate is screwed to
the back-plate.
3
The looped pipe is cut and then
connected to the radiator valves.
4
The following is good practice for
‘first-fix’ pipework: (see Figure 31)
• radiator ‘drops’ should be run
vertically, side by side, at one end
of the radiator position.
• lateral pipes should be run
horizontally in line with
plasterboard penetrations.
• avoid running pipework along any
obvious fixing zone ie. at skirting
level.
90º M & F
Elbows
(HX4/10)
Skirting
board
Radiator Draincock
(HX23/15
90º M & F Elbows
(HX4/10)
Thermostatic
Radiator Valve
(HX71/10)
90º Elbow
(HX5/10)
Pipe Clip
(HX84/10)
Figure 31
Radiator pipework in 10mm Hep 2 O ®
For fixing pipework to lightweight
blockwork the HX65 Pipe Clip
Cable Type is not suitable for fixing
directly to such walls because of the
low pull-out resistance of the nail.
In such circumstances a more
secure hold can be achieved by
fixing wooden dowels at each clip
position. The dowels should be the
solid type with a serrated surface
and of sufficient size (not less than
M8 x 30mm).
Holes should first be drilled in the
blockwork using a drill bit size
which provides a tight fitting hole
for the dowel, taking care not to
over-drill the hole depth. After
tapping in the dowels the pipe clips
can then be fixed by knocking the
nail into the centre of each dowel.
Alternatively, use the screw fixed
Fitting Clip HX84 shown below.
The pipe is looped through the Back Box
(HX109 or HX110).
Completed installation.
Two 5mm fixing
holes, one each
side
80