trap

Glossary

dip

Of a trap, 1 the lowest portion of the inside top surface of the channel through the trap.

Pic

back vent

An individual vent for a plumbing fixture located on the downstream (sewer) side of a trap, 1 to protect the trap against

Glossary

flap trap

In plumbing, a trap having a hinged flap which allows flow in one direction only, preventing backflow.

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