drum trap

drum trap

[′drəm ‚trap]
(engineering)
In plumbing, a trap in the form of a cylinder with a vertical axis that is fitted with a removable cover plate.

drum trap

drum trap
In plumbing, a cylindrical trap, with its axis in a vertical direction, having a cover plate which may be unscrewed for access; commonly used on the drainpipe from a bathtub or under a bathroom floor.
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References in periodicals archive ?
Bathtubs sometimes have a drum trap, a coffee-can-sized cylinder that can be opened for cleaning either through a plate in the floor or from underneath.
The problem of the drum trap highlights one important advantage of a P-trap (or even the old S-trap).
The water seal didn't siphon out as easily from drum traps, so plumbers didn't always vent them.