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Backflow Preventer Installation in San Diego
Licensed C-36 installation of RP, double check, and PVB backflow assemblies for new construction, purveyor-mandated devices, and failed-device replacement across San Diego city and county.
San Diego's Licensed Backflow Installer
California Backflow & Chlorination installs backflow prevention assemblies throughout San Diego County. We are a licensed C-36 plumbing contractor (#1117687) and ABPA-certified — the two credentials that matter when a backflow preventer is put into your water line.
We already test and service backflow assemblies across Southern California for dozens of mechanical, plumbing, and pipeline contractors. Installation is a natural extension of that work: we size the right device for your hazard level, install it to your water purveyor’s standards, and certify it on the spot so your system is compliant from day one.
We work throughout San Diego County — including Downtown San Diego, La Jolla, Point Loma, Mission Valley, Kearny Mesa, Clairemont, Pacific Beach, Sorrento Valley, Rancho Bernardo, Mira Mesa, Scripps Ranch, Carmel Valley, Chula Vista, National City, El Cajon, La Mesa, Santee, Spring Valley, Lemon Grove, Poway, Escondido, San Marcos, Vista, Oceanside, Carlsbad, Encinitas, Del Mar, Coronado, and Imperial Beach — within the service areas of the City of San Diego Public Utilities Department and county water districts including Helix, Otay, Sweetwater Authority, Padre Dam, Vallecitos, Olivenhain, and Vista Irrigation.
What Our San Diego Backflow Installation Covers
RP / RPZ Assemblies
Reduced Pressure Principle Assembly — the highest level of protection, used for higher-hazard cross-connections such as commercial, industrial, and chemical or irrigation systems with injection.
Double Check Valve Assemblies (DC)
Used for low-to-moderate hazard applications and commonly specified on fire-sprinkler supply lines.
PVB & Spill-Resistant Vacuum Breakers
Pressure Vacuum Breakers protect irrigation systems against back-siphonage and install above ground per placement rules; Spill-Resistant Vacuum Breakers cover specific back-siphonage applications.
New Construction & Tenant Improvements
New water services, irrigation systems, and fire lines are installed to your plans and your purveyor’s standard drawings before the meter is released or the building is occupied.
Purveyor Letters & Failed-Device Replacement
Whether the City of San Diego or your water district issued a notification letter, or an existing assembly failed and can’t be repaired, we handle it start to finish with an approved replacement device.
Initial Certification & Filing
As a certified tester, we test every new assembly on the spot, then submit certified results to your water purveyor so the device is compliant from day one.
Why Choose California Backflow & Chlorination
Licensed & Insured
Every job is performed under C-36 Contractor License #1117687 and ABPA certification, backed by the credentials California requires.
One Company, Start to Finish
We install your assembly, certify it at installation, and test it every year after — with no need to hand the job off to a second contractor.
Purveyor-Ready Reports
Every certified result is formatted for direct submission to the City of San Diego or your county water district, with same-day filing whenever possible.
One Call Does It All
Plumbing, chlorination, and backflow work are handled by the same crew in one visit — trusted by Sygnos, APS, IPW, Davis, and JDS Mechanical across Southern California.
Our San Diego Installation Process
Scope
We ask a few questions about the job: device size, location, water purveyor, and whether you’re working from plans or a purveyor letter. If you have drawings or a notification letter, send them over.
Size & Source
We confirm the correct assembly type and size for your hazard level and pull an approved device that meets your purveyor’s requirements.
Install
We install the assembly to code and to your purveyor’s standard drawings — typically as close to the meter as practical and ahead of any branches, valves, or regulators, with above-ground placement where required.
Test & Certify
As a certified tester, we test the new assembly on the spot and provide certified results. New assemblies must be certified at the time of installation, so your device is compliant the day it goes in.
File & Follow Up
We submit the certified results to your water purveyor and remind you when your annual test comes due — so you stay in compliance year after year.
Common Questions
Do I need a licensed contractor to install a backflow preventer in San Diego?
Yes. In California, installing or repairing a backflow preventer is plumbing work that legally requires a licensed C-36 contractor. California Backflow & Chlorination holds C-36 license #1117687.
Who requires me to install a backflow preventer?
Your water purveyor. The City of San Diego and county water districts require backflow assemblies on many commercial, industrial, multi-family, irrigation, and fire-service connections. The City of San Diego requires a backflow prevention assembly at each meter for all 1.5-inch-and-larger meters serving multi-family and commercial/industrial properties, and on dedicated irrigation meters regardless of size. Requirements vary by district, so check your notification letter or ask us.
What type of backflow preventer do I need?
It depends on your hazard level and your purveyor’s rules. RP assemblies are used for higher-hazard connections, double checks for lower hazard and many fire lines, and PVBs for irrigation back-siphonage. We confirm the correct type against your plans and your purveyor’s approved-device list.
Does the new device need to be tested after installation?
Yes. A backflow assembly must be certified by an approved tester at the time of installation, annually after that, and any time it’s depressurized, relocated, or repaired. We test and certify on the spot.
How much does backflow installation cost in San Diego?
Cost depends on device type, size, location, and site complexity, so we quote each job individually. Call (858) 523-8113 with your details and we’ll give you a quote.
How long does installation take?
Most standard installations are completed in a single visit. Timing depends on device size and how the water service is configured. We’ll give you a realistic estimate when we scope the job.
Do you install for new construction and tenant improvements?
Yes. We install backflow assemblies for new water services, irrigation systems, and fire lines from plans, and coordinate certification so the device is compliant before occupancy.
Call (858) 523-8113 to Schedule Your San Diego Backflow Installation
✔ Same-Day Scheduling ✔ Upfront Pricing ✔ Purveyor-Ready Reports ✔ Licensed & Insured
California Backflow & Chlorination
Licensed C-36 Contractor #1117687
DPR License #140023
ABPA-Certified Backflow Testers
State-Certified Laboratory Partner
Contact
(858) 523-8113
spencer@cal-backflow.com
Serving Los Angeles, Orange, San Diego,
San Bernardino & Riverside Counties