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Q » What causes sewer gas smell under sinks?

Mark

08 Dec, 2025

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A » A sewer gas smell under sinks is often caused by a dry P-trap, which usually traps water to block odors. If unused, the water evaporates, allowing gases to escape. Other causes include a damaged or loose seal around the sink drain or venting issues in the plumbing system. Regularly running water through the drain and checking for leaks or blockages can help prevent these odors.

Michael

08 Dec, 2025

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A »Sewer gas smell under sinks is usually caused by a dried-out P-trap or a faulty vent pipe. The P-trap can dry out if the sink isn't used frequently, allowing sewer gases to rise. Check and refill the P-trap or inspect the vent pipe for blockages to resolve the issue.

David

08 Dec, 2025

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