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Backflow Testing in Los Angeles
Certified Testing, Repair & Compliance Documentation for LA Property Owners
If you’ve received a testing notice from LADWP, backflow testing isn’t optional. It’s a compliance requirement tied to your water service, with a deadline and real consequences for missing it. Red Lilly Plumbing has served Los Angeles since 1924, and our licensed, bonded, and insured team handles the full process: certified testing, same-visit repair if a device fails, and compliance documentation for LADWP’s Cross-Connection Control Program. Residential or commercial, we help keep your property on schedule and in compliance.
Our bilingual technicians work with a broad range of Greater Los Angeles property owners and managers. Whether you manage a single-family home with an irrigation system or a multi-tenant commercial building, we work with you in the language you prefer.
Ready to schedule backflow testing in Los Angeles or get a free estimate? Call (323) 319-4102 and we can get you on the calendar.
What Los Angeles Backflow Testing Requirements Mean for Your Property
LADWP administers a Cross-Connection Control Program under the Los Angeles Municipal Code and California’s statewide cross-connection control requirements. Any property with a backflow prevention assembly on an LADWP service connection must have that assembly tested annually by a certified tester. LADWP sends notification letters approximately 60 days before your testing deadline.
Missing that deadline carries real consequences. Continued non-compliance can result in a compliance charge added to your water bill or, in serious cases, water service disconnection. If a device fails its test, a passing re-test report must reach LADWP within 14 days. Properties served by Los Angeles County Waterworks Districts face a parallel program with the same annual obligation and similar enforcement. Starting July 1, 2026, California also requires all backflow assembly testers to hold certification recognized by the State Water Resources Control Board.
Our Backflow Prevention Services
We provide annual certified backflow testing for residential and commercial properties throughout Los Angeles. Our technicians test all common assembly types, including RPZ (reduced pressure principle), DCVA (double check valve assembly), and PVB (pressure vacuum breaker) devices, using calibrated differential pressure gauges as required.
Where most single-service backflow testers stop at documenting a failure, we don’t. Because our technicians are licensed plumbers, they can diagnose and repair a failed assembly on the same visit. After repair and re-test, we provide the compliance documentation property owners need for LADWP submission through the BSI Online portal. Properties with fire sprinkler systems, irrigation connections, boilers, or cooling towers are among those that typically require annual testing. Our preventive maintenance plans let us track your due dates so nothing slips through the cracks.
Why Los Angeles Property Owners Work with Red Lilly Plumbing
Four generations of Los Angeles plumbing service since 1924 means we’ve worked through every iteration of this city’s water infrastructure. That history shapes how we handle compliance work: methodically, with the full documentation trail your property needs.
What sets our team apart:
- Weekly OSHA training for all technicians, so our work is safe and up to current standards
- Same-visit repair capability: No second scheduling window if your device fails
- Bilingual staff: Accessible service across Greater Los Angeles
- Free, transparent estimates before any work begins
- Preventive maintenance plans to keep your property on a compliant annual schedule
Exclusive Savings on Expert Plumbing
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Trusted by Homeowners Across Los Angeles
Since 1924, Los Angeles families have trusted us for honest, reliable service.
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“Red Lilly Plumbing came out to my home on a Sunday. They came out within the hour fixed my kitchen sink that was leaking. Great work and good price thanks Red Lilly- thanks Karen Hollywood Hills CA that was leaking. Great work and good price. Thanks Red Lilly”Karen
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“Called first thing and they said they'd call back after they made the schedule. 10 minutes later, they called with an appointment time. Ramon arrived on time and solved our clogged drain pipe under our house. He was friendly and helpful, explaining what he was doing. We were so relieved.”Gordon M.
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“I came home one day and their was sewer water all through my house i found a plumber down the street from my house and he stared telling me my main line was broken and that it was going to be tens of thousands of dollars. of course i panicked and i called for a second opinion and my Saviors came to the door, Red Lilly Plumbing came and saved the day. they gave me a good price and cleaned up the mess with in just a few days, They did such a wonderful job in keeping my yard looking great, they relined my pipe without even having to dig up my yard. I am so glad that I found them!”Happy Customer
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“I had a wonderful experience with Red Lilly, they replaced my sewer line, i had a clogged drain and my toilet was overflowing and they came to my house and ran their fiber optic camera and found a severe broken section of my sewer pipe. optic camera and found a severe broken section of my sewer pipe. i had others plumbers but they were charging me an arm and a leg for an inspection. Red Lilly on the other hand came and did the inspection for free. I am satisfied with their work, There prices were very affordable and reasonable. I will recommend them to all my friends and family.”Jose
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“Thank you Jovani and John (juan) for coming in and servicing our toilet. We were lucky that the door stopper (piece of wood) didn't fall in the drains. Who knows if it was some kids or a unique individual. You guys were outstanding and quick! Second time calling you guys for service. I appreciate it.”Ulices (DeSano Pizza) Los Angeles, CA
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“Amazing customer service! The Red Lilly Plumbing team helped with a water pressure issue. They were thorough, professional, and extremely helpful. Great attitude and they solved the problem without extra costs. Honest and trustworthy with a sunny attitude! Thank you!”L D.
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“I just recently moved into a new apartment that needed some plumbing work. I am so happy I found Red Lilly! They were so helpful over the phone as well before coming in. They were on time for the appointment which was amazing as most service appointments are always late. They were also super quick on the job- always a plus!! Would recommend to all my friends and family!”Keala P.
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“I recently moved to Los Angeles into a new house. They are very responsive to our needs and reasonably priced. They do not create an atmosphere that things are really bad. They fix the problem and are knowledgeable. The office answers immediately and sets appointments. The technicians arrive on time, or pretty close to on time and complete the task and make sure that it is done right! I only call Red Lilly for plumbing needs.”Stuart G.
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“Best plumbers ever!!! They came out when I called and fixed the problem so quickly!!! They were so nice and so terrific! They were able to check my mainline as well as all my drains to make sure we were ship shape!! Thanks, Red Lilly! I know I will be calling you again...hopefully not too soon!!!!!”Sarah B.
