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Plumbers of Boise
Plumbers of Boise
Plumbing · Idaho
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Water Heater Repair

Water pooling under a tank means the vessel itself is failing, so shut the gas or the breaker and close the cold inlet before it opens up further.

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When this becomes an emergency

What a pro does

A plumber reads the tank's history before deciding anything, and in this valley that history is mostly about minerals. Water across the Boise area carries a heavy dissolved load, and every gallon heated leaves a little of it behind as scale on the bottom of the tank. That layer is what makes an aging heater pop and rumble, because water gets trapped under it and boils. It also means the burner has to fire longer for the same result. Flushing helps a unit that's been maintained. It does much less on one that hasn't been touched in ten years, and pretending otherwise doesn't do the homeowner any favors. The anode rod is the other thing worth inspecting, since it's designed to corrode so the tank wall doesn't, and once it's gone the steel is next. Pressure matters as well. Many newer valley homes have a pressure-reducing valve on the service, which makes the plumbing a closed system, and without a working expansion tank the relief valve on the heater ends up absorbing every thermal cycle. Where the unit sits in an unconditioned garage, venting, combustion air and drainage get looked at along with everything else.

Frequently asked questions

It carries out the loose sediment sitting at the bottom before that layer sets hard. Done on a regular basis it keeps the burner in contact with the water it's heating. Done once on a decade-old tank, it often just confirms how much has already built up.
Often it's a pressure problem rather than a valve problem. When the service has a pressure-reducing valve and there's no working expansion tank, the water heated inside the tank has nowhere to expand to, so pressure climbs on every cycle until the relief valve does its job.
It's a sacrificial piece of metal hanging inside the tank that corrodes in preference to the steel around it. As long as it's got material left, the tank wall is protected. Once it's consumed, corrosion moves to the tank itself, which is when leaks start.
It changes what ends up in the tank, since less mineral going in means less sediment forming. It's a water treatment decision with its own considerations, so a plumber will talk through what it does and doesn't affect rather than treating it as a fix for an existing heater.

Water Heater Repair?

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