600mm maximum
300mm
minimum
Safety device
(e.g. Temperature
relief valve)
Metal discharge pipe (D1) from
Temperature relief valve to tundish
Tundish
Discharge below
xed grating
(Building Regulation
G3 section 3.61 gives
alternative points
of discharge)
Fixed grating
Trapped
gully
Discharge pipe (D2 from tundish,
with continuous fall. See Building
Regulation G3 section 3.56,
Table 4 and worked example)
Table 3 - Sizing of copper discharge pipe (D2) for common temperature relief valve outlet sizes
Fig 5 - Typical discharge
10
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