Efficient Water Heaters, Inc.

San Jose Water Heater Specialist

Water Heater Replacement in San Jose, CA

Replacement for leaking tanks, failed heat exchangers, and end-of-life units — installed correctly, permitted, and hauled away the same day where possible.

Call (408) 470-0191 for Replacement Get Phone Estimate
  • Licensed CSLB #1008381
  • Same-Day Replacement
  • Permit-Ready Installs
  • Old Unit Haul-Away
  • Phone Estimates
Licensed San Jose plumbers replacing a residential water heater with a new tank unit

What this service covers

Replacement is the right call when a tank shell leaks, the heat exchanger fails, the unit is past 12 years, or repairs no longer pencil out. We handle removal, install, and permit.

If you are replacing a gas water heater in 2026 or later, we also help you think through BAAQMD Rule 9-6 and whether tank, tankless, or heat-pump options make sense.

  • Leaking tank shell or bottom corrosion
  • Failed heat exchanger on tankless units
  • Repeated thermostat or gas valve failures
  • Units past 12 years and losing efficiency
  • Like-for-like tank replacements
  • Tank-to-tankless or tank-to-heat-pump upgrades
  • Permit pull and inspection coordination
  • Old unit removal and haul-away
Not sure yet? Read repair or replace? for a fast decision check.

How Our San Jose Water Heater Replacement Process Works

1

Confirm failure and need

We verify the failure is the tank or core component — not a fixable part — before quoting a replacement.

2

Size the new water heater

We size by fixture count, simultaneous use, fuel type, and whether the 2027 Bay Area rule changes affect your replacement plan.

3

Remove old unit and prepare

We drain and remove the old unit, prep the install location, and update venting, gas, and expansion tank as needed.

4

Install, test, and haul away

We install the new unit, pressure-test, verify combustion safety or electrical operation, and take the old unit with us.

What we do on the job

Replacement is more than a swap. We bring the install up to current code and document the new model so future service is straightforward.

  • Drain and disconnect the failed unit
  • Inspect and update gas or electrical connections
  • Install or replace expansion tank
  • Install seismic strapping per CPC 507.2
  • Replace T&P valve and discharge line
  • Update venting clearances and combustion air
  • Pressure-test water and gas connections
  • Haul away and recycle the old water heater
Replacement Review
“We were in a bind. Had no water and couldn't get ahold of anyone on the weekend. Joseph responded immediately. Scheduled an appointment the next day and gave us a beautiful new tankless hot water heater for the same price as the previous person quoted for a 40-gallon. His work was very nicely done and we are very happy with our new efficient water heater.”
Celeste G. — San Jose, CA

San Jose Replacement Factors We Check

In older San Jose neighborhoods — Willow Glen, Cambrian, Rose Garden, Almaden, Berryessa, Evergreen — we routinely find missing expansion tanks, undersized gas lines, single straps, and outdated venting on units being replaced. We bring everything up to code during the replacement instead of leaving issues for the next call.

  • Tank shell vs fitting leak verification
  • Garage and closet install clearances
  • Expansion tank presence and condition
  • Two seismic straps in correct positions
  • Venting condition and B-vent clearances
  • Hard-water and descaling history for tankless candidates
  • BAAQMD Rule 9-6 planning for 2027
We replace water heaters across San Jose, Santa Clara, Sunnyvale, Cupertino, Mountain View, Campbell, Los Gatos, Saratoga, Milpitas, and the South Bay.

Replace Now vs Repair One More Time

Use this matrix to decide whether replacement is truly needed or one more repair still makes sense.

Leak source

Replace now: Tank shell or bottom seam leaks

Repair one more time: Fitting, T&P valve, or accessible connection

Age

Replace now: 12+ years, or near manufacturer warranty end

Repair one more time: Under 8 years and otherwise healthy

Repair history

Replace now: Second major repair within 12 months

Repair one more time: First minor repair on this unit

Efficiency and demand

Replace now: Undersized or end-of-life unit

Repair one more time: Properly sized and serviceable

2027 BAAQMD planning

Replace now: Replacing in 2026 or later — compare zero-NOx-ready options before choosing a system.

Repair one more time: Stable unit, no replacement planned soon

Not sure which path fits your situation?

Call (408) 470-0191Get Phone Estimate

Replacement Brands and Systems We Install

We replace tank, tankless, and heat-pump water heaters from major brands including Navien, Rinnai, Noritz, Bradford White, A.O. Smith, Rheem, and RUUD. We choose the system based on hot-water demand, install location, fuel type, and 2026/2027 replacement timing.

Related guides & services

Frequently asked questions

In many cases the same day. Speed depends on the unit type, parts availability, and install location. Photos of the data plate and top connections help us confirm same-day feasibility.

Need to Replace a Failed Water Heater?

Call or request a phone estimate. We'll confirm replacement need, size the right system, and coordinate the permit before any work starts.

Call (408) 470-0191 Get Phone Estimate
  • Licensed CSLB #1008381
  • Bonded & Insured
  • Open 24/7

Navien Service Specialist · Rinnai PRO · Noritz Certified