Trap Seal Primer

Trap primers are used in plumbing systems to prevent floor drain traps from losing their water seal by evaporation. Maintaining the water seal will prevent the backflow of sewer gas into the buildings or rooms where the traps are installed.
Trap seal primers provide a supply of water to replenish the deep seal or “P” trap of a drain to prevent sewer or potentially explosive methane gas from entering the area through the floor drains.