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

Annual backflow
certification, handled.

If your property has a backflow preventer, your water provider requires it to be tested every year, and we make it painless. We test on-site with calibrated equipment and file the paperwork directly with your water provider, so you never have to deal with it.

What testing covers

The annual certification process.

Each year, your water provider requires a certified tester to verify your backflow preventer is functioning. We:

  1. Schedule the test at a time that works for you
  2. Test with calibrated gauges to your water provider's specifications
  3. File the results directly with your water provider for you
  4. Quote the repair or replacement if the device fails
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 →
DN
David Nunez
★★★★★ Apr 2026
GOOGLE

They made a appt. And tech was on time for a estimate. Appreciate the effort will hold on to their # first call.Second call....main sewer 😬 John answered our call and sent out the A-team. Freddie his main worker explained what needed to be done and did not…

VR
Vinny Rosales
★★★★★ Jul 2026
GOOGLE

Matthew Perez did a good job accessing the potential problems. He snaked the drain, removed my 50 year old toilet and installed a new toilet, supply line and 1/4 angle stop. The work was accomplished professionally and to my satisfaction

KN
K Nade
★★★★★ Jan 2026
GOOGLE

This was a great experience today with Sweetwater's technician Anthony! He was able to diagnose everything after his thorough scope of the kitchen' sinks plumbing area. He also adressed the issue & advised me what the next step to take to resolve the issue. I…

Common Questions

Frequently asked questions.

How much does backflow testing cost in the Inland Empire?
It depends on the device and how many you have. We give you a flat-rate price in writing before we test, and the price you approve is the price you pay. Our customers tell us our pricing is honest and fair.
Are you licensed for backflow testing in California?
Yes. Sweetwater Plumbing is a licensed C-36 Plumbing Contractor (California CSLB #889182), fully bonded with $2M general liability insurance. Our backflow testers hold backflow tester certification, and we file the test results with your water provider.
Where do you offer backflow testing?
We provide backflow testing 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

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