Should You Repair or Replace Your Water Heater?

Which signs point to a repair?

A water heater is a fairly simple appliance, and many failures come down to a single part that can be swapped in an hour or two. Common repairable problems include:

• No hot water on an electric unit. Often a failed heating element or thermostat.
• Pilot will not stay lit on a gas unit. Usually the thermocouple or the gas control valve.
• Water dripping from the relief valve discharge pipe. Can mean a worn temperature and pressure relief valve, or household pressure that is too high.
• Rotten egg smell from the hot water only. Frequently tied to the anode rod, which can be replaced.
• Rumbling or popping. Sediment on the bottom of the tank. A flush may help if the tank is not too far gone.
• A leak at a fitting. Drips from a supply connection, drain valve or union are usually fixable.

HomeGuide's cost guide lists typical professional prices for these parts: thermostat or heating element replacement at $100 to $350, a thermocouple at $100 to $325, a gas control valve at $150 to $550, an anode rod at $150 to $350 and a relief valve at $50 to $300. A tank flush runs $75 to $250. Some plumbers also charge a minimum call-out fee of $50 to $200.

Which signs mean it is time to replace?

• Water seeping from the tank body or bottom. HomeGuide notes that leaks from the bottom of a tank usually require full replacement. Once the steel liner is breached there is nothing to patch.
• Age past about 10 years. HomeGuide gives a lifespan of 8 to 15 years for tank heaters and suggests considering replacement for any unit over 10 years old.
• A repair that costs half or more of a new heater. At that point you are putting fresh parts on an old tank.
• Rusty hot water. If the cold water is clear and only the hot is discolored, the inside of the tank may be corroding.
• Repeated breakdowns. Two or three service calls in a year usually add up to the cost of a new unit.

You can usually find the manufacture date on the label on the side of the tank, sometimes coded into the serial number. If you cannot read it, a plumber can.

What do repairs and replacements cost locally?

These local averages line up with HomeGuide's national figure of $600 to $1,800 for a standard tank replacement, though code upgrades, venting changes or a move to a different fuel or style can push a job above those ranges. If an average repair quote of around $600 is being proposed on a heater that is 11 or 12 years old, that is the classic case where replacement usually makes more sense. See the water heater repair service page or the replacement page for what each visit covers.

How does Inland Empire water affect the decision?

Hard water speeds up the end of a tank's life. Minerals settle on the bottom as scale, insulating the water from a gas burner or burying the lower element on an electric unit. That means longer heating times, noise and more stress on the steel. Hardness reported by local utilities includes:

• Riverside Public Utilities: about 197 mg/L on average, or roughly 12 grains per gallon
• San Bernardino Municipal Water Department: 242.2 mg/L on average from Bunker Hill Basin groundwater
• Colton's Colton/Rialto sources: about 207 mg/L on average

San Bernardino's water department even publishes a water heater maintenance handout on its water quality page. In practice, a tank in a hard-water home that has never been flushed or had its anode checked is a weaker candidate for repair than one that has been maintained. HomeGuide suggests replacing anode rods every 3 to 5 years. If your home has very hard water, it may be worth pairing a new heater with a water softener; the Inland Empire hard water guide explains the tradeoffs.

What does California require when you replace one?

Earthquake bracing

California Health and Safety Code section 19211 requires all new, replacement and existing residential water heaters to be braced, anchored or strapped to resist falling or sliding during an earthquake, at least to the standard of the California Plumbing Code. When you sell a home, the seller must certify in writing that the heater complies. A repair visit is a good time to have the plumber check that the straps are still present and tight.

Permits

Replacing a water heater usually requires a permit in this region. The City of Riverside can issue a simple water heater change-out permit over the counter the same day. Colton requires a building permit to replace, relocate or install a water heater. Eastvale says water heater permits are usually issued over the counter, and in unincorporated communities such as Winchester the County of Riverside issues them. Calimesa publishes a handout covering water heater installation requirements. A plumber who pulls the permit also arranges the inspection.

Should you switch types while you are at it?

A failed tank is the natural moment to consider a different kind of heater, because you are paying for installation either way. Going tankless costs more up front and may need a larger gas line or new venting, but the unit can last longer. Our comparison of tankless and tank water heaters lays out the costs, and the tankless installation page describes what the job involves. If you want hot water back quickly and the existing setup works, a like-for-like tank swap is the simplest choice.

What if you smell gas near the heater?

Do not try to relight the pilot or investigate. Leave the house first, then call 911 and SoCalGas at 1-800-427-2200 from a safe place. Some homes are all-electric or use propane, and your gas bill shows which utility to call. After the utility clears the home, a plumber can repair the gas connection or valve. Our guide on what to do when you smell gas covers the steps in more detail.

How can you get more years from the heater you keep?

If the plumber recommends a repair and the tank is still sound, a little upkeep helps it reach the long end of its lifespan:

• Flush it once a year. Draining a few gallons from the valve at the bottom removes loose sediment before it hardens into scale. In homes with very hard water, more frequent flushing can help.
• Have the anode rod checked. The rod corrodes so the tank does not. Once it is used up, the steel liner starts to rust.
• Test the relief valve. Lifting the lever briefly should release a burst of water into the discharge pipe. If it sticks or keeps dripping afterward, have it replaced.
• Watch household pressure. Pressure that is too high strains the tank and the relief valve. RPU requires customers to install a regulator where static pressure exceeds 80 psi. The water pressure guide explains how to test it.
• Keep the area clear. Storage boxes, paint cans and cleaning supplies do not belong near a gas burner or its air supply.

A quick decision checklist

1. Find the heater's age from the label.
2. Check where the water is coming from: a fitting or valve, or the tank itself.
3. Ask the plumber for the repair price and a replacement price on the same visit.
4. If the repair is more than half the replacement cost, or the heater is over 10 years old, lean toward replacing.
5. Confirm the quote includes the permit, seismic straps and haul-away of the old tank.

If the tank is actively leaking, shut off the cold supply valve at the top of the heater and turn off the gas or the breaker before calling. For broader context on what local plumbing work costs, see the Riverside plumber cost guide.