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INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH
8-716-106-252a (03.05)
10
WATER SYSTEMS & PIPEWORK
WATER SYSTEMS & PIPEWORK
FILLING PRIMARY SYSTEMS:
Filling the system must comply with one of the
methods shown opposite.
The filling point must be at low level and must
never be a permanent direct fixing to the mains
water supply.
Filling loops must be WRAS approved.
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 in accordance
with the Water Regulations as they will be
operating at mains water pressure.
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.
Heating return
Hose
return
Non return
valve
Non return
valve
Test cock
Stop
cock
Water main
supply
Stop
cock
Temporary hose
Heating return Auto air
vent
Non return
valve
Stop
cock
Make up
vessel
1000mm above
the highest point
of the system
Fill Point
