Potterton Gold Installation And Servicing Instructions page 9

Safety device
(e.g. Temperature
relief valve)
Fig. 5: Typical discharge pipe arrangement (extract from Building Regulation G3 Guidance section 3.50)
TO HOT
OUTLETS
ELEMENT /
CONTROLS
HOUSING
PRIMARY
RETURN
PRIMARY
FLOW
Fig. 6: Typical installation - schematic
Metal discharge pipe (D1) from
Temperature relief valve to tundish
600mm maximum
300mm
minimum
Discharge pipe (D2) from tundish,
with continuous fall. See Building
Regulation G3 section 3.56, Table 1
and worked example
EXPANSION
T&P RELIEF
VESSEL
VALVE
INLET DRAIN COCK
(NOT SUPPLIED)
Tundish
BALANCED COLD WATER
COMBINATION
COLD WATER
VALVE
CONNECTION
(IF REQUIRED) (2-PIECE)
TUNDISH
SECONDARY RETURN
TAPPING (IF REQUIRED)
NOT SUPPLIED
Discharge below
fixed grating
(Building Regulation
G3 section 3.61 gives
alternative points
of discharge)
Fixed grating
Trapped
gully
MAINS
WATER
SUPPLY
ISOLATING
VALVE (NOT
SUPPLIED)
DISCHARGE
PIPE
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