Regulations - ESP Ecocent 100L Installation And Operation Manual

A 22mm cold water supply is recommended, however, if a 15mm (1/2")
supply exists which provides sufficient flow it may be used. More flow noise
may be experienced from small bore pipes due to the increased water
velocity through them.
The Cold Water should be fitted with a full flow isolation valve which will
enable the unit to be isolated from the mains supply for maintenance or
servicing.
An inline filter (open vented) and an effective scale prevention device should
be fitted.
9.4 G3 Requirement
G3 (ENGLAND AND WALES), TECHNICAL STANDARD P3 (SCOTLAND) OR BUILDING
REGULATION P5 (NORTHERN IRELAND) AND THE WATER FITTING REGULATIONS
(ENGLAND AND WALES) OR WATER BYELAWS (SCOTLAND).
There shall be precautions to ensure that the hot water discharged from
safety devices is safely conveyed to where it is visible but will not cause
danger to persons in or about the building.
9.5 G3 Guidance
The installation should include the discharge pipe(s) (D1) from the safety
device(s). In either case the tundish should be vertical, located in the same
space as the unvented hot water storage system and be fitted as close as
possible and within 500mm of the safety device(s) e.g. the TPRV.
The discharge pipe (D2) from the tundish should terminate in a safe place
where there is no risk to persons in the vicinity of the discharge, and be of
metal
a) be at least one pipe size larger than the nominal outlet size of the
safety de- vice unless its total equivalent hydraulic resistance exceeds
that of a straight pipe 9m long i.e. discharge pipes between 9m and
18m equivalent resistance length should be at least two sizes larger
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