Run Water in Unused Drains
Run water in guest bathrooms and unused sinks monthly to prevent P-trap evaporation.
DIY Cost
$0
If Ignored
$50
Frequency
Monthly
Difficulty
Easy DIY
Most homeowners can handle this in under an hour with basic tools.
How to do it — step by step
For any sink, floor drain, or toilet that isn't used regularly, run water for 30 seconds or flush the toilet once a month. P-traps (curved pipes under drains) hold water that blocks sewer gases from entering your home. When they dry out, you may smell sulfur or sewage indoors. In guest bathrooms, also add a cup of water to floor drains.
Recommended tools & supplies
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