Cold Water
Inlet Valve
Secondary Return Pipe
Hot Water Service
Check Valve
Bronze
Pump
To Drain
Balanced
Cold Water
Take Off
(Optional)
SECTION 3 •
INSTALLATION
32
If higher flow rates are required for the cold water
services, a suitable tee fitting should be fitted to the
pipework upstream of item C1.
The pipework fitted to the tundish outlet should be one
size larger than the outlet pipe of the safety device and
should be terminated at a suitable drain.
(See Building Regulations 1992 Approved Document G3).
All fittings and materials must be suitable for use with
drinking water and listed in the current Water Research
Centre “Materials and Fittings Directory”.
Installation of unvented storage hot water systems must
comply with Part G3 of the Building Regulations 1992.
Typical water service layout for unvented system is
shown in Fig 12.
Fig. 12
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