Fire Hydrant standpipes are connected to an underground hydrant as part of a mains water supply.
Standpipes without non-return valves are intended
for use by fire brigades in emergency applications,
whereas other users should be using a standpipe with
a non-return valve in order to prevent back-flow of
contaminated water into the mains system.
Options include double check valves and both
single and double headed variants. Outlets are 2 1/2″
female instantaneous and inlet options are 2 1/2″ BSRT
