I had an interesting discussion recently about the use of check valves. One plumbing contractor commented that most plumbers don’t know how and where to install check valves. I countered with, “Shouldn’t the engineer designing the system tell the plumbing contractor where the check valves must be installed?”
His response was very appropriate: “What about single-family dwellings?” Touche! What about single-family dwellings? For that matter, what about any water distribution system? When and where do we install check valves?