What methods do people use to drain a riser that is located in a basement?
We have a four-story building with the sprinkler riser in the basement. The basement consists of a small mechanical room and the rest is earth-filled.
Would it be permitted to run a drain pipe up to the surface, which would drain the majority of the system until the water finds its level, and then provide a secondary 1" drain which would run to a sump pit?
In this particular situation, the remaining water adds up to roughly 20 US gallons. The sump pit is 42 US gallons, and the sump pump is rated for 50 GPM.
Thank you very much!
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