Serving Montclair & the Inland Empire
Licensed & Insured Honest. Reliable. Local.
Sweetwater Plumbing 💬 Text us ☎ (909) 312-4516

Water heater service.
Every type. Every brand.

A cold shower is a rough way to start the day, and we know how disruptive a failing water heater feels. From a thermostat replacement to a full tankless conversion, we service every type installed in Inland Empire homes and businesses, with flat-rate quotes, same-day repair when we can, and an honest take on whether it is smarter to repair or replace. No pressure, just what is right for your home.

Water heater leaking right now?

Turn off the cold-water valve at the top of the heater. For a gas heater, turn the gas control to OFF; for an electric heater, switch off its breaker. Then call (909) 312-4516 any hour, or text (909) 247-6791 from 8 a.m. to 8 p.m. If you can’t stop the water there, shut off the main water valve.

Water Heater Expert
A.O. Smith Authorized Service Contractor: service, repair, warranty and replacement from a water heater expert. We install, service and replace A.O. Smith water heaters, and Hot Water Heater Factory is our water heater division. Verify our A.O. Smith listing →
What we work on

Which type of water heater is right for you?

Compare Water Heater Types
FeatureTank (Storage)Tankless (On-Demand)Heat Pump (Hybrid)
Typical lifespan8 to 12 years15 to 20 years with regular descaling10 to 15 years
Hot water capacityLimited by tank size (30 to 100 gal)Continuous, up to the unit's flow rating (GPM)Limited by tank size (50 to 80 gal)
Energy efficiencyGas about 0.60 to 0.70 UEF; electric about 0.92 to 0.95 UEFGas about 0.81 to 0.97 UEF; electric about 0.98 to 0.99 UEFHighest (about 3.3 to 4.0 UEF)
Space requiredGarage closet or utility roomWall-mounted, compactGarage or utility room with at least 700 cu ft of air around it
Installation complexityStraightforward replacementMay need gas/electrical upgradeNeeds a 240V circuit (or a 120V plug-in model), a condensate drain, and room for airflow
Best forSmaller homes, lower upfront costHigh hot-water demand, long-term valueInland Empire garages (warm most of the year), max efficiency
Rebates availableLimitedSome utility programsVaries by utility and program; ask us what is open now

Water Heater Repair

Same-day service for most non-urgent jobs booked before noon: thermostats, heating elements, gas valves, pilot assemblies. We diagnose and quote before any work.

New Installation

Full installation of new units. Gas or electric, tank or tankless. Installed to code, with earthquake straps included.

Tankless Water Heaters

Tankless install, conversion, repair and descaling. Endless hot water and lower energy bills. Gas and electric options.

Tank Water Heaters

Traditional tank installations in 30, 40, 50, 75 and 100-gallon sizes. Gas and electric.

Hybrid Heat Pump

Heat pump water heaters cost the least to run. Rebates change often, so we check what your utility offers now.

Annual Maintenance

Tank flush, anode rod check, T&P valve test, gas connection inspection. Our 14-point inspection includes a yearly pressure regulator test and a written report with photos.

The step most plumbers skip

Expansion tank
air charge.

When water heats up, it expands. In a home with a pressure regulator or a check valve on the main line, that extra water has nowhere to go, so an expansion tank takes it in. Inside the tank is a cushion of air, and it only works when its air pressure matches your home’s water pressure.

Expansion tanks are pre-charged at the factory (commonly 40 PSI, depending on the brand), but many Inland Empire homes run 60 to 80 PSI. Installed straight out of the box, the tank fills with water and stops doing its job. That puts extra strain on the water heater, the relief valve and every fixture in the house.

Whenever an expansion tank goes in, we measure your home’s water pressure first and set the tank’s air charge to match. Most plumbers skip it. We never do.

Service Area

Serving 24 cities across the Inland Empire.

Chino · Chino Hills · Claremont · Colton · Corona · Diamond Bar · Eastvale · Fontana · Grand Terrace · Highland · La Verne · Loma Linda · Mira Loma · Montclair · Norco · Ontario · Pomona · Rancho Cucamonga · Redlands · Rialto · Riverside · San Bernardino · San Dimas · Upland

What customers say

Real reviews from real customers.

★★★★★4.8 / 5 average
· View all 588+ Google reviews →
SM
Suzie Morales
★★★★★ Jul 2025
GOOGLE

Freddy the serviceman was great. He explained everything in detail about what needed to be done. He replaced my water heater and a few other things that needed attention. Very pleased with the work he completed. Will use Sweetwater plumbing again when needed…

LP
Linda Plum
★★★★★ Dec 2025
GOOGLE

Freddie and his crew were very professional respectful kind and understanding. I had my mobile home completely repiped and did little extra for me. Now I am set in My forever home knowing I have new and good pipes and water heater. I can not thank you enough.

SC
Sandra Carbett
★★★★★ Apr 2025
GOOGLE

I had to have a new water heater. When I called Sweetwater Plumbing they sent a plumber right out. Freddy Lopez was outstanding and explained everything to me. Freddy was very professional at all times. I know that if I need a plumber in the future I will be…

Common Questions

Frequently asked questions.

How much does water heater service cost in the Inland Empire?
Every water heater job is different, so we look at it first and give you your options in writing, each with one flat-rate price, before any work begins. No surprises. Our customers tell us our pricing is honest and fair.
Are you licensed for water heater service in California?
Yes. Sweetwater Plumbing is a licensed C-36 Plumbing Contractor (California CSLB #889182), fully bonded with $2M general liability insurance.
Where do you offer water heater service?
We provide water heater service throughout the Inland Empire, including Montclair, Ontario, Upland, Rancho Cucamonga, Chino, Chino Hills, Pomona, Claremont, Fontana, Riverside, and 14 other cities. Call (909) 312-4516 to confirm coverage.

Helpful guides & tools

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