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Safety devices Safety
DANGER!
Safety valve outlet
The safety valve outlet must be directed to the ground
in a pipe so nobody is endangered by hot water or
steam.
The safety valve discharge (vent) pipe must have
at least the same nominal diameter as the valve
outlet, have a consistent downhill gradient and be
routed to a sewer connection. The vent pipe may
contain a maximum of 2 bends and be 2 m long. If
a length of more than 2 m is required, the next size
of pipe must be selected. More than 3 bends and
4 m of length are not permitted. The mouth of the
vent pipe must allow easy inspection and be routed
such as to exclude any danger to persons. If the
vent pipe ends above a funnel, its discharge pipe
must have a diameter at least double that of the
valve inlet.
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