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Drain trap
Also called: P-trap, sink drain
A fitting under the drain that holds a little water so sewer smells can't come back up.
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Photo: Raquel Baranow (CC BY-SA 4.0)
When you'd need this
- There's a sewer smell coming up from the drain
- My bathroom sink drains slowly
- The drain pipe is leaking
Measure and check before you buy
- Pipe diameter
- Trap shape (P-trap or S-trap)
- Connection type
Safety: Caution: never mix drain cleaners.