What this service includes
- Diagnosis of the true leak source
- T&P relief valve replacement and discharge-line check
- Drain valve replacement (including brass upgrades)
- System pressure check
- Expansion tank recommendation if pressure is the cause
- Post-repair leak test
The two valves that commonly leak
The temperature & pressure relief (T&P) valve is a safety device that releases water if pressure or temperature climbs too high. If it drips, it may simply be doing its job (a sign of excess pressure that needs an expansion tank) or it may be worn and need replacing. The drain valve at the base is used for flushing; older plastic ones crack and weep over time. Both are far cheaper to fix than a tank.
Why a dripping T&P valve shouldn't be ignored
A relief valve that discharges regularly is telling you something — often that system pressure is too high or the water is overheating. Capping it is dangerous; the correct fix is to find out why it's discharging (frequently a missing or failed expansion tank) and address that, then replace the valve if it's worn. A pro diagnoses the cause rather than just swapping the part.
Signs you need water heater valve replacement
- Water dripping from the valve on the side of the tank
- A discharge pipe that's wet or dripping
- Weeping or dripping from the drain valve at the base
- Puddling that traces back to a valve, not the tank
- A hissing or release sound from the T&P valve
- Corrosion or mineral crust around a valve
What affects the price
We never quote a price sight-unseen — our technician gives you an upfront quote after diagnosing the problem. Typical cost factors include:
- Which valve (T&P vs. drain) and its type
- Whether an expansion tank is also needed
- Accessibility of the connections
- Unit age and overall condition