Backflow preventer testing?
Backflow preventer testing?
(OP)
For sprinkler systems with a backflow preventer (most have a double check type if not a RPZ type) do you put a hose connection in to facilitate forward testing? (NFPA 13 07 24.2.5)
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Backflow preventer testing?
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RE: Backflow preventer testing?
Normally it is a tee piped to outside with normally closed valve
Some allow flipping of the check in the FDC
RE: Backflow preventer testing?
For sprinkler systems with a backflow preventer (most have a double check type if not a RPZ type) do you put a hose connection in to facilitate forward testing? (NFPA 13 07 24.2.5)
Yes the flow should be equal to the highest sprinkler demand and hose streams if downstream of the backflow device. Depending on the flow it can be a test header such as a fire pump is tested, to just a main drain from the sprinkler riser.