I have a wet sprinkler system fed by a combined standpipe/sprinkler riser by municipal water with a "brand new" fire pump in the basement.
Where should the main drain be installed?
The municipal water enters the building and goes through the backflow preventer and then into the fire pump both being located in the fire pump room. After the fire pump, the riser goes to floor #1 and above. On the first floor there is a floor control valve with drain.
I explained to property manager that a main drain is required in the fire pump room to test the adequacy of the water supply and drain the system. The installer agreed with me but explained that is was not part of the drawing and he did not install one because he did not get paid for one.
The property owner consulted with the engineer of record who said that the main drain is not in the fire code. He also said his plans for the fire pump installation were approved by the Department of Building. He also consulted with other more experienced engineers in his firm and was told that no main drain is required on the fire pump piping or in the pump room, but if I wanted to drain the system or perform a main drain test I could do it from the first floor.
Is a main drain in the basement fire pump room required?
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