Emergency plumbing
Professional emergency plumbing dispatched directly from our Farquhar Ave shop in Los Alamitos

Commercial & Compliance
Reliable, code-compliant backflow testing for Los Alamitos, Rossmoor, and West Orange County properties. Handled by experienced local technicians with upfront written pricing. Call (207) 419-2600.

Backflow prevention assemblies protect our community's potable water supply from dangerous cross-contamination caused by backpressure and back-siphonage. Operating from our local workshop at 3535 Farquhar Avenue, our certified cross-connection control specialists deliver testing, rebuilding, and certification services across Los Alamitos, Rossmoor, and West Orange County:
Our certified testers arrive on schedule, ensuring your property remains fully compliant with state and municipal health regulations.
Backflow assemblies are mechanical devices operating under continuous water pressure. Recognizing early failure warnings prevents water service disruption:

Backflow prevention assemblies in Los Alamitos and surrounding commercial districts operate under demanding local conditions:
Local municipal water supplied by Golden State Water Company averages 14 to 22 grains per gallon of mineral hardness. Over months of static line pressure, calcium and magnesium scale precipitates across brass valve seats and rubber poppets. This scale prevents internal check valves from closing completely, causing devices to fail annual differential pressure tests.
California Plumbing Code requires Reduced Pressure Zone assemblies to be mounted above ground with a minimum 12-inch clearance below the relief port to ensure proper atmospheric venting. Because these units contain substantial bronze and brass, street-facing units along Katella Avenue and Los Alamitos Boulevard are susceptible to theft. Installing anchored security enclosures is essential for business continuity.
While Southern California winters are mild, outdoor backflow assemblies experience intense summer heat and damp marine layer humidity from Seal Beach. UV radiation degrades rubber diaphragm seals and check valve discs, while ocean salt air corrodes test cock threads and exterior ball valve handles.
Received an annual backflow testing notice or noticing water leaking from your RPZ valve? Call (207) 419-2600 to schedule certified testing from our Farquhar Avenue team.
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Certified backflow testing follows strict engineering standards established by the University of Southern California (USC) Foundation for Cross-Connection Control:

When servicing backflow assemblies in Los Alamitos, our certified technicians adhere to a methodical procedure:
Understanding the applications of different backflow devices ensures proper code compliance for your property:
| Assembly Type | Code Designation | Approved Hazard Level | Common Local Application |
|---|---|---|---|
| Reduced Pressure Zone | RP / RPZ | High hazard (toxic chemicals, sewage, grease) | Restaurant kitchens, commercial irrigation, boilers |
| Double Check Valve | DC / DCVA | Low hazard (non-toxic substances only) | Commercial fire sprinkler systems, dedicated fire lines |
| Pressure Vacuum Breaker | PVB | High/Low hazard (back-siphonage only) | Residential lawn sprinkler systems (no backpressure) |
| Double Check Detector | DCDA | Low hazard fire systems with flow detection | Large commercial fire loops requiring leak detection |
Our certified technicians evaluate your property's plumbing configuration to ensure your backflow assemblies match current municipal cross-connection codes.

Backflow prevention in Los Alamitos is governed by California state law and local municipal requirements:
Our shop handles all required documentation, ensuring your certified records are logged properly with local authorities.
Cross-connection testing requires state-certified credentials, calibrated diagnostic tooling, and reliable reporting. Local businesses and property owners depend on our team:
Simple maintenance habits help prevent backflow failures and avoid costly municipal water shutoff warnings:
To schedule certified annual backflow testing or arrange device repairs, call our Farquhar Avenue team today at (207) 419-2600.
Frequently Asked Questions
Under California Code of Regulations Title 17 and local water utility mandates, cross-connection control devices must be tested annually by a certified backflow prevention tester. Backflow preventers safeguard the public drinking water distribution system from back-siphonage and backpressure that could draw contaminated irrigation water, industrial chemicals, or stagnant fire line fluids back into municipal drinking water.
If a check valve or differential relief valve fails to hold required pressure differentials, our certified technician identifies the cause—typically mineral encrustation from Golden State Water supplies or worn rubber seals. We carry factory OEM rebuild kits for Febco, Wilkins, and Watts assemblies, allowing us to disassemble, clean, rebuild with new silicone discs and stainless springs, and retest the device during the same appointment.
We do. Following completion of the inspection, our certified tester completes official paperwork and submits the signed test reports directly to Golden State Water Company's Cross-Connection Control Department and the City of Los Alamitos Building Division. We also apply a certified, weather-resistant inspection tag directly onto your valve.
A Double Check Valve Assembly (DC / DCVA) utilizes two independent check valves in series, approved for low-hazard cross-connections like dedicated fire sprinkler lines. A Reduced Pressure Zone (RPZ / RP) assembly includes two check valves plus an automatic differential relief valve that vents water to the atmosphere if either check valve fails. RPZ valves are required for high-hazard connections such as restaurant kitchen lines, commercial irrigation systems, and chemical injection equipment.
Because backflow preventers are constructed of high-grade bronze and brass and mounted above ground, they are frequent targets for scrap metal theft. We install heavy-gauge powder-coated steel security cages securely anchored into concrete footings with tamper-resistant security padlocks, paired with insulated thermal blankets to protect against winter freezing.
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Where We Perform This Service
Orange County
Master-planned 1956 community founded by Ross W. Cortese featuring 3,400 single-family slab homes and signature red brick perimeter walls
Orange County
Coastal city featuring historic Old Town beachfront cottages, The Hill bungalows, and the 1962 Leisure World active-adult cooperative
Orange County
Postwar residential subdivisions incorporated in 1956, featuring single-story ranch tracts with original slab plumbing
Los Angeles County
East Long Beach tracts surrounding El Dorado Park, Los Altos, and Plaza built in the early 1950s with cast iron drainage
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