PRE-
INS
T
ALL
A
TION
INSTALLATION & SERVICING INSTRUCTIONS
8 716 115 219b (09.2008)
10
WATER SYSTEMS & PIPEWORK
FILLING PRIMARY SYSTEMS:
• The CH sealed system must be filled using
a WRAS approved filling loop or comply
with the diagram opposite for system fill.
• The filling point must be at low level and
must never be a permanent direct fixing
to the mains water supply.
SHOWERS/BIDETS:
• If a shower head can be immersed in water
or comes closer than 25mm from the top
edge of a bath or shower tray spill over
level then an anti-siphon device must be
fitted to the shower hose.
• Bidets with direct hot & cold mains water
can be used (with the approval of the local
water authority) and must be the over rim
flushing type with shrouded outlets to
prevent the fitting of hand held sprays.
DOMESTIC HOT WATER:
• Taps and mixing valves must be capable
of sustaining a pressure up to 10 bar.
• Hot water temperature and flow rate are
affected by the size and insulation of
pipework making up the distribution system
and are controlled by the hot water tap
and the water main inlet pressure. A mixing
valve can be fitted if a more permanent
setting is required.
• If using more than one outlet at once
causes water flow starvation, fit flow
balancing valves or Ball-O-Fix valves to the
appropriate outlets.
WATER SYSTEMS & PIPEWORK
Heating return
Hose
return
Non
return
valve
Non
return
valve
Test cock
Water main
supply
Stop
cock
Temporary
hose
Stop
cock
