Wondering , what is reason behind the Control valve and check valve of the same size at the connection is required per 13 8.17.5.2.2 (1)
I have a connection , where I connect to the standpipe with 2.5" pipe and then to a PRV control valve , then after I feed a standard hose valve and reduce down to 2" for my sprinkler control valve assembly . Thanks . Colin Carew
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