Assertion: plumbing fixture's trap | /r/CapableOf | lose its water seal
Facets:
value: by siphonic action
type: MANNER
Source sentences:
text: A trap, however, would lose its water seal by siphonic action every time a fixture is used unless the air on the sewer side is balanced with the air on the house side.
text: Odors are most likely to arise from leaks in the waste or vent piping or from traps which have lost their water seal.