Unvented hot water cylinder – SCxn…d/i, SCxn…sd/si
Page 11 of 28
ST0109 – C 05/09
WATER
5 It is recommended to install a drain valve in the lowest point of the cold water feed
to the cylinder. This allows the cylinder to be drained in a controlled manner should
this become necessary.
Note: Between the inlet group and the cold water inlet on the cylinder NO
isolating
device should be fitted as by doing so important safety devices could be isolated!
6 The temperature and pressure relief valve must be discharged into the tundish. The
sizing of the discharge pipe work is regulated through building regulation G3. An ex-
tract is shown in Figure 6.
01
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