Apparatus for controlling the pressure of gas by bubbling...
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
Housing for a liquid seal vacuum and pressure relief valve...