Does anybody have a reliable and accurate formula to figure out the flow through the 3" gang drain for a high rise standpipe with PRVs?
This to size the floor drain properly and to pass along to the plumber.
Also, when draining a system, you only drain one system per floor at a time when needed. The annual testing of PRVs, would be the worst case scenario in my opinion...250 gpm out of each. The 500 gpm at the roof should be handled by the Rain storm drains, right? Thank you kindly.
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