A one-half inch domestic cold water branch piping feeds a trap primer, which connects to a primer distribution unit. From the distribution unit, one-half inch copper lines extend downward to supply individual floor drains. The system accommodates single to multi-unit configurations with one distribution line routed to each floor drain.
1/2" TRAP PRIMER DCW BRANCH PIPING PRIMER DISTRIBUTION UNIT 1/2" COPPER TO FLOOR DRAINS SINGLE TO MULTI-UNIT: ONE DISTRIBUTION LINE TO EACH FLOOR DRAIN
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