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

High-volume hot water,
kept running.

Sweetwater Plumbing installs, repairs, and maintains commercial water heaters for restaurants, hotels, and multi-family buildings in Montclair and across the Inland Empire, and we are an A.O. Smith Authorized Service Contractor. Commercial water heating is different: higher demand, larger systems, recirculation loops, and a real cost when it goes down (lost meals, unhappy guests, failed health inspections).

Commercial systems we service

From restaurant booster to hotel central plant.

  • Restaurant booster heaters: keeping dishwasher rinse water at 180°F+
  • Commercial tank water heaters: 75 to 100+ gallon residential-style units, and commercial tanks up to 250 gallons
  • Commercial tankless: modulating, bank-style installations
  • Hotel central plants: boiler-fed circulating hot water systems
  • Multi-family: central systems serving entire buildings
  • Recirculation pumps: hot water at the tap without the long wait
When it goes down

Hot water problems cost a business more.

A failed commercial water heater can stop a kitchen, empty a hotel's showers or bring complaints from every tenant at once. When you call, we find the cause, explain the repair and replacement options in writing, and get your hot water back as soon as the right parts allow.

Inland Empire water is hard. Scale builds up inside commercial heaters faster than most owners expect, which shortens their life and drives up energy use. Regular flushing and maintenance keep systems running longer.

Planning ahead

Replace on your schedule, not in an emergency.

  • Sizing: we size the system to how your building actually uses hot water, now and as it grows
  • Maintenance: flushing, anode checks and safety valve testing to catch problems early
  • Recirculation: checking pumps and loops so a failing recirculation pump is caught before guests and tenants notice
  • After-hours scheduling: we can plan replacements for when your business is closed
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 →
AA
Amber Adams
★★★★★ Mar 2025
GOOGLE

Can't say enough good things about Sweetwater Plumbing. They've serviced our drains at our car wash twice now. Their employees are all very friendly, knowledgeable and efficient. Not only were they on time but they were early! The owner, John, couldn't be…

GH
Gloria Hernandez
★★★★★ May 2026
GOOGLE

Great experience with this Sweetwater plumbing. They were easy to schedule, arrived on time, and quickly fixed the issue. Everything was explained clearly and we're very professional. I highly recommend.

AF
Aaron Foley
★★★★★ Apr 2026
GOOGLE

John and his team have been extremely helpful in alleviating my plumbing issues on two separate occasions now, and I would not hesitate to recommend them.They have been very clear about estimates, scope of work, have arrived promptly at decided start times…

Common Questions

Frequently asked questions.

Do you service commercial A.O. Smith water heaters?
Yes. Sweetwater Plumbing is an A.O. Smith Authorized Service Contractor: service, repair, warranty and replacement from a water heater expert.
Our hot water runs out during busy times. What can be done?
That usually means the system is undersized for current demand, or scale has cut its capacity. We look at how your building uses hot water and explain the options, such as maintenance, added storage, or a larger or additional unit.
Can you replace our water heater after hours?
Yes. We offer after-hours scheduling for commercial work, so a planned replacement doesn't interrupt your business.
How often should a commercial water heater be maintained?
It depends on the system and how hard it works. Hard Inland Empire water makes regular flushing important. Once we see the system, we tell you how often it should be flushed and checked.
Do you work on restaurant booster heaters?
Yes. We install and service booster heaters that bring dishwasher rinse water up to sanitizing temperature.

Related Services

(909) 312-4516 Text us