Hep20 Technical Handbook

Hep 2
O ® Design Considerations
Construction Types & Water Distribution
Hep 2 O ® Within Internal
Drywall Systems
Hep 2 O ® can easily be cabled within
timber studwork and proprietary
wall systems during construction.
This method is often used for
running feeds to radiators or where
concealed plumbing is necessary.
A connection for a radiator can be
made using a secured elbow in the
wall and fixing a plastic snap-on
Escutcheon Plate HX83 to neatly
cover the hole in the wall surface.
Alternatively for 10mm Hep 2 O ® ,a
drylining box can be used which
gives the advantage of allowing minor
alignment adjustment to the ‘tail’
during ‘second-fix’ (see Figure 28)
and allowing access to the elbow.
This solution can also be used where
the radiator is fed from below in
which case the risers should be
located directly under each box.
‘First-fix’ pipework should follow
the good practice advice in
‘Hep 2 O ® Within Drylined Walls’ on
page 80, and also ‘Pipes Through, and
Adjacent to, Metalwork’ on page 69.
10mm Hep 2 O ®
Single Socket Elbow, use SlimLine
type for neatness (HX4/10)
Drylining box and cover plate
(single gang electrical fitting)
Demountable Elbow (HD5/10)
Non-loadbearing internal drywall system
Figure 28
Radiator connection using 10mm Hep 2 O ®
and a drylining box within a drywall system
Escutcheon Plate HX83
Hep 2 O ® Within Timber
Framed and Steel Framed
Buildings
Hep 2 O ® is ideal for use within both
timber framed and steel framed
buildings. For recommendations
applicable to internal partition walls
refer to ‘Hep 2 O ® Within Internal
Drywall Systems’, on this page.
Running pipework of any material
within the external wall of framed
buildings should not be done
without consideration of the
following:
•
if a leak occurred on a pipe it
should be discovered without
delay as seepage within a wall
may damage the structural frame
and affect the performance of
insulating materials.
•
Water Regulations require that
pipes should not be fixed in a
situation where leaks could be
undetected for long periods.
•
where a pipe passes through a
vapour control layer the
installation method should allow
possible future replacement of
pipe without affecting the
integrity of this layer.
•
pipework should be installed on
‘warm’ side of thermal insulation
layer.
To comply with the foregoing
criteria, pipework should be either
run within a recessed duct designed
by the Architect or run within a
conduit system. Whichever method
is used it is necessary to consider
the detail at the junction between
the wall and floor to avoid floor
joist problems and to agree pipe
penetrations at header rails/bottom
rails. For radiator connections,
10mm Hep 2 O ® within conduit pipe
may be used (see Figure 29).
The suggested installation sequence
is as follows:
1. Prepare sketches showing
setting-out dimensions for each
drylining box including height
and hole size.
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