Do Floor Sinks Need Trap Primers

Do your inspectors require trap primers on floor sinks.

Do floor sinks need trap primers.

Other types divert gray water to the trap from nearby sink drains. The trap primer mitigates this problem by. I have a situation where the sink will get discharge from a radiant boiler in the. Trap primers main disadvantage is maintenance.

A trap primer or trap seal primer is a plumbing device or valve that adds water to traps the water seals in traps are needed to prevent sewer gases from entering buildings but because this water is exposed to the air it is subject to evaporation over time in infrequently used floor drains leading to the release of sewer gas into the environment. Each trap except for traps within an interceptor or similar device shall be self cleaning. Like many plumbing fixtures their supply orifices are easily blocked by scale or corrosion. 1 2 chrome plated under lav trap primer assembly.

1 2 fip lead free brass trap primer. The item in the picture to the right is referred to as a floor sink. Floor sink as a waste receptor. For a water supply fed type trap primer this happens automatically based upon a water pressure drop when there is flow within the potable water piping system such as using a sink faucet flushing a toilet etc.

It is similar to a floor drain as it is installed flush with the floor but has a much larger chamber to receive the indirect wastes and does have a strainer as called for in the plumbing code in addition to the grate. Floor drains or similar traps directly connected to the drainage system and subject to infrequent use shall be protected with a trap primer except where not deemed necessary for safety or sanitation by the authority having jurisdiction. Cleaning or replacing them can be an expensive proposition especially when they require floor and wall demolition repair for access.