3 services · San Jose
Water heaters in San Jose, CA
Most tank water heaters last about 8 to 12 years. A plumber can often repair a heater that stops making hot water, but a tank that leaks from the bottom has failed and needs to be replaced. Tankless heaters last longer but cost more to install, especially if the gas line or venting has to change.
- Licensed local plumbers
- The problem explained before work starts
- Price agreed before the job begins
Water heaters services in San Jose
Water heater repair
UrgentIf a gas water heater has no hot water, the pilot, thermocouple or gas valve is the usual cause; on an electric heater it's usually an element or thermostat. Those parts are repairable. A tank that leaks from the bottom can't be repaired and needs to be replaced.
Water heater replacement in San Jose
A leaking tank or a heater past about 10 years old is usually replaced rather than repaired. A proper install includes a permit, correct venting (adjusted for altitude where needed), an expansion tank where required, a drip leg on the gas line and a relief valve discharge pipe.
Tankless water heaters
A tankless water heater heats water as it flows, so it doesn't run out, but it needs a larger gas line, its own venting and a unit rated for your elevation. Installed correctly and descaled regularly, it can outlast a tank heater.
Local conditions
Water heaters in San Jose: what's different
Hard water builds scale in San Jose water heaters and tankless units, shortening their life and cutting efficiency. Many tract homes keep the heater in the garage, where a failing tank floods the floor and storage around it.
California requires water heaters to be strapped against earthquakes, and flexible gas connectors reduce the chance of a break. Replacement in an older Willow Glen home often means updating venting and adding seismic straps that were never installed. Permits come from the City of San Jose's Building Division in Planning, Building and Code Enforcement.
- Water and sewer in San Jose
- Water service is split among San Jose Water (a private utility), San Jose Municipal Water and Great Oaks Water, depending on the address. The city provides sewer service.
- Permits in San Jose
- Plumbing permits are issued by the City of San Jose's Building Division in Planning, Building and Code Enforcement.
San Jose housing and plumbing
Willow Glen and Rose Garden homes often have galvanized supply and cast-iron or clay drains. The 1950s–70s tracts have copper supply now prone to pinhole leaks, often on slab foundations.
Other San Jose conditions that affect plumbing
- Hard water: Hard water builds scale in water heaters and tankless units, shortening their life.
- Slab leaks in copper: Copper lines under 1950s–70s slabs develop pinhole leaks, often found by warm floors or high bills.
- Earthquake readiness: California requires water heaters to be strapped, and flexible gas connectors reduce break risk.
- Older Willow Glen drains: Willow Glen and Rose Garden homes often have clay sewer laterals and cast-iron drains, and mature trees send roots into the joints, causing repeat clogs.
Neighborhoods and ZIP codes
Plumbers on Thawline cover San Jose and Santa Clara County, including Willow Glen, Rose Garden, Almaden Valley, Evergreen, Cambrian, Downtown. ZIP codes: 95101 · 95103 · 95106 · 95108 · 95109 · 95110.
When to call a plumber in San Jose
- No hot water, or hot water that runs out much faster than it used to
- Water pooling around the base of the tank
- Rumbling or popping from the tank
- Rusty or smelly hot water
- A pilot that won't stay lit or a tankless unit showing an error code
- A heater more than 10 years old before it fails
How these problems start and how to choose between repair options is covered in the water heaters guide.
Water heaters questions in San Jose
Do San Jose water heaters need earthquake straps?
How long does a water heater replacement take?
More plumbing in San Jose
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