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pipe material for drain of sprinkler system

Question asked by jelsonpjohn on Jul 22, 2018
Latest reply on Aug 6, 2018 by milt.werner

We are having the building of four floors, so from each floor there is drain. Pipes for sprinkler system is black steel. Is there any NFPA code stating the material or is there any standard practice that we should use the same material of sprinkler system for the drain pipe in the shaft(riser).