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Water Heater Repair

Water pooling under the tank means shutting its cold supply valve and cutting the gas or the breaker before anything else gets touched.

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When this becomes an emergency

What a pro does

A leak and a heat failure are different visits, so the plumber sorts that first. Water at a fitting, a valve or a union is a part and it gets replaced. Water weeping from the seam or the base of the jacket means the tank has rusted through and there's no repair for that. On the heat side, gas units get worked through the pilot, the thermocouple, the gas valve and the venting, and electric units get their elements and thermostats tested. In these older Birmingham-area basements a few things show up repeatedly. Galvanized nipples on top of the tank corrode and choke flow, so a heater that seems weak is really just restricted. And where the water utility has a check valve at the meter, the system becomes closed, meaning heated water has nowhere to expand and pushes the relief valve open. A trickling relief line often traces back to a missing or waterlogged expansion tank rather than a fault in the heater itself.

Frequently asked questions

Usually excess pressure rather than excess heat. When the house system is closed off from the street, water expanding as it heats has nowhere to go, so pressure climbs until the relief valve opens. An expansion tank gives it somewhere to go. The valve should never be capped to stop the drip.
Sediment on the tank bottom. Water trapped underneath it flashes to steam and forces its way up through the layer, which is the noise you hear. It also means the burner is heating that mineral layer instead of the water, so the unit works harder than it should.
It matters most where a leak would go unnoticed or run toward finished space or a floor drain that's already sluggish. A pan plumbed to a drain gives a failing tank somewhere to go. It won't handle a full tank letting go all at once, but it catches the slow start of one.
If they're galvanized and corroded, yes. They restrict flow and they're an easy point to address while the heater is already being worked on. Leaving them in place on a new heater is how a fresh install ends up with the old unit's weak hot water.

Water Heater Repair?

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