Automatic adjustable trap priming valve

Back water trap

Conduit trap and condensation recovery device

Drain pipe trap

Drain trap

Drain trap and cover construction

Drain trap apparatus

Drainage canal

Fixtures for trapping condensation

Flexible trap for drains

Flood control valve assembly

Flood control valve assembly

Floor drain and trap

Floor trap primer valve

Flow trap with compartment separator and baffle for use in a...

Gas and liquid backflow-preventing valve device for drains

Gas pressure relief apparatus

Horizontal-flow oil-sealant-preserving drain odor trap

Liquid closing device

Liquid column pressure and vacuum vent