A device that automatically keeps water in a floor drain trap so sewer gas can't escape into the building.
A device that automatically supplies water to a floor drain or other infrequently used trap to maintain the water seal and prevent sewer gas infiltration. Trap primers are required by code for floor drains in mechanical rooms, commercial kitchens, and other locations where drains may not receive regular water flow. Types include automatic valve primers and distribution units.
The mechanical room floor drains were each connected to an automatic trap primer to prevent sewer odors from entering the space.
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