10 field-tested tips
- 1Every drain that smells has a dry trap, a broken trap, or a biofilm colony — start there before dosing.
- 2Pour a quart of water into every floor drain monthly to keep traps sealed.
- 3Install auto-primers on floor drains in seasonal areas (mechanical rooms, storage).
- 4Snake and enzyme-treat any drain with a 12-month backup history.
- 5Never use caustic drain openers on a chronic-odor line — they destroy the trap coating and worsen odor.
- 6Camera-inspect any drain that keeps smelling despite treatment — the answer is usually a belly or a break.
- 7Check the roof vent stack for bird nests, ice, or debris; a blocked vent = sewer gas indoors.
- 8In restrooms, biofilm on the underside of the urinal rim is the top hidden odor source.
- 9Enzyme drain gel dosed weekly outperforms monthly liquid; contact time matters more than volume.
- 10Kitchen prep sinks need a grease-specific treatment, not a general drain treatment.
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