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What's most likely is a clogged vent pipe, animals get stuck or make nests in there and it effectively defeats the traps.
by newnewpdro 7y ago
What's most likely is a clogged vent pipe, animals get stuck or make nests in there and it effectively defeats the traps.
- Scoundreller 7y agoThough when that happens on an in-use fixture, you’ll hear the gurgling.