Plumber how-to
How to Replace a Sink P-Trap
A cracked or clogged P-trap is one of the most common service calls.
Quick answer
A cracked or clogged P-trap is one of the most common service calls. In short: place; loosen; clean, then complete the remaining steps below.
Step by step
Place a bucket under the trap and wear gloves.
Loosen the slip nuts on both ends of the trap and remove it.
Clean or inspect the tailpiece and trap arm for damage.
Fit the new trap with slip nuts and washers oriented correctly (beveled side toward the joint).
Align the trap and hand-tighten the slip nuts, then snug them slightly.
Run water and check every joint for leaks.
Safety reminders for plumbers
- Use ventilation and respirators when required for fumes and chemicals
- Follow confined-space and trench safety rules
- Wear eye protection when cutting, soldering or using drain machines
- Wash thoroughly after exposure to sewage and get recommended vaccinations
Key terms
DWV · P-trap · Vent stack · Cleanout · Backflow preventer · PEX: see the full plumber glossary.