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Sewage Smell in the House: Causes, Dangers and Fixes

Sewage smell in your house? Dry traps, cracked vents, and failing sewer lines are the top causes. Learn what's safe to check yourself and when to call a NH sewer plumber.

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Dry P-traps

Every drain has a water-filled trap that blocks sewer gas. A floor drain or guest bath that has not been used in weeks dries out. Pour a gallon of water down it and see if the smell fades.

Cracked vent or wax ring

A rocking toilet or a smell strongest in one bathroom points to a failed wax ring. A smell that comes and goes with wind or weather can be a cracked plumbing vent in the attic or wall.

Failing sewer line

A persistent smell in the basement or yard, especially with gurgling drains, means the sewer line may be cracked or partially blocked. A camera inspection settles it, and sewer line repair fixes it before it becomes a backup.

Need a plumber?

MJA Plumbing and Heating handles this problem every day across New Hampshire. Related services:

Local pages: Sewer Backup Cleanup & Repair in Manchester, Nashua, Concord, Dover, Keene, Portsmouth and every other NH town.

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Need a plumber now?

Emergency plumbers on call 24 hours a day across New Hampshire. Upfront pricing, same-day service.

(888) 480-9811
📞 Call (888) 480-9811 — 24/7