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

Tank water heaters
installed & repaired.

Tank water heaters are still the most common choice for Inland Empire homes, and for good reason: they are reliable and well understood. Whether you need a repair or a replacement, we install and service gas and electric tank heaters in 30, 40, 50, 75, and 100-gallon sizes, and we are happy to help you pick the right fit.

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: here’s how.

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. Verify our A.O. Smith listing →
Sizing your tank

How big should your tank be?

Quick sizing rule for Inland Empire homes:

  • 1-2 people, 1 bath: 30-40 gallon
  • 2-3 people, 2 baths: 40-50 gallon
  • 3-4 people, 2-3 baths: 50 gallon (most common)
  • 5+ people: 50-75 gallon
  • Large families, big tubs, simultaneous use: 75-100 gallon, or consider tankless

Bigger isn't always better. Oversizing wastes energy heating water you won't use. Undersizing means cold showers. We help you size it properly based on your actual household. One note: under federal efficiency rules, electric tanks over 55 gallons must be heat pump models, and gas tanks over 55 gallons must be high-efficiency (condensing) models, so 75- and 100-gallon tanks cost more than a simple size bump.

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 →
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…

GM
Greg Marick
★★★★★ May 2024
GOOGLE

Can’t sing Sweetwater Plumbing’s praises enough. When I first inquired about replacing my 75-gallon gas water heater with an 80-gallon heat pump water heater, I was impressed with John Howe’s product knowledge and ability to understand my goals. (I was very…

CS
Celso Sapien
★★★★★ Sep 2026
GOOGLE

My water heater was not heating water anymore. Called Sweetwater Plumbing and John was of great help and full of information. Plus his response time to get job done was on point. The gentlemen that came out to do repairs were quick and professional.Thank…

Common Questions

Frequently asked questions.

How much does tank water heater service cost in the Inland Empire?
We look at the job first, then give you your options in writing before any work begins, each with one flat-rate price. The price you approve is the price you pay. Our customers tell us our pricing is honest and fair.
Are you licensed for tank 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 tank water heater service?
We provide tank 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.

Related Services

Helpful guides & tools

(909) 312-4516 Text us