Repair or replace: how we decide
A heater that has failed at a component — thermocouple, gas control, heating element, thermostat — is usually worth repairing, particularly if it is under ten years old and the tank itself is sound.
A heater leaking from the tank is not repairable at any price. Once the steel has corroded through, the only question is what replaces it. The honest test is where the water is coming from, and that takes a look rather than a phone diagnosis.
What a code-compliant install includes
A water heater changeout is permitted work, and the inspection covers more than the appliance.
- Two seismic straps at the correct heights, anchored into structure rather than into drywall.
- A drip pan with a drain line routed to somewhere water can safely go.
- A temperature and pressure relief line run full-size to within a few inches of the floor, with no valve in it.
- Correct venting for the appliance type, with the flue properly connected and sloped.
- Sediment trap, correctly sized supply connections, and an expansion tank where the system requires one.
Why heaters die early on Orange County water
Costa Mesa is supplied by Mesa Water District entirely from local groundwater, and groundwater carries mineral. Inside a tank that mineral drops out as sediment, insulating the burner from the water and making the heater work harder for the same result — which is what the rumbling noise actually is.
The other consumable is the anode rod, a sacrificial metal rod that corrodes so the tank does not. When it is spent, the tank becomes the sacrificial part, and that failure arrives as water on the floor. A flush and an anode check partway through a heater’s life is the cheapest maintenance in the house.
Sizing, and the mistake people make
Most replacements are like-for-like, and that is usually right. Where it is not right is a household that has changed — a bathroom added, a family grown, a soaking tub installed — and has been running out of hot water for years without connecting the two.
We size by fixture count and recovery rather than by what was there before, and we will say plainly when the existing size is fine. Selling a bigger tank to a house that does not need one is not an upgrade.
