Certified Backflow Prevention to Keep Your Water Clean and Safe

Protect your water supply. Call Superior 1 Plumbing at (800) 921-2525 for certified backflow prevention in Greater Los Angeles — available 24/7!

Red, blue, and brass irrigation pipes with valves and fittings on dry dirt ground.

Protect Your Drinking Water From Contamination

Backflow is a serious public health risk that occurs when contaminated water reverses direction and enters the clean water supply. Superior 1 Plumbing provides certified backflow prevention device installation, and repair for residential and commercial properties throughout Greater Los Angeles and the surrounding South Bay. Call (800) 921-2525 today — we are available 24/7 and offer FREE estimates.

What Is Backflow and Why Does It Matter?

Under normal conditions, water flows in one direction—from the municipal supply into your home or building. Backflow occurs when a sudden drop in water pressure causes the flow to reverse, potentially drawing contaminants such as fertilizers, pesticides, sewage, or industrial chemicals back into the clean drinking water supply. The two main types of backflow are the following:

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Backpressure backflow—occurs when downstream pressure exceeds supply pressure, forcing water to reverse direction back into the main supply.

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Back-siphonage—occurs when a sudden drop in supply pressure creates a vacuum that draws water backward from a contaminated source into the distribution system.

Both types are preventable with the right backflow prevention assembly installed and maintained by a licensed professional.

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Exposed gas meter pipes and valves in a grassy yard over muddy ground

Who Is Required to Have Backflow Prevention?

Many municipalities in California — including communities throughout Greater Los Angeles — require property owners to install and annually test backflow prevention devices. You may be required to have a backflow preventer if your property has:

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An irrigation or sprinkler systemconnected to the potable water supply

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A swimming pool or spa with an automatic fill connection

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A fire suppression or sprinkler system connected to the water main

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Commercial plumbing connections with potential cross-contamination risks

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Industrial or medical equipment connected to the water supply

Superior 1 Plumbing will assess your property, determine what is required, and keep you in full compliance with local regulations.

Backflow Prevention Device Installation

Superior 1 Plumbing installs all types of backflow prevention assemblies for residential and commercial properties, including:

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Reduced pressure zone (RPZ) assemblies — the highest level of protection for high-hazard applications

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Double check valve assemblies—for moderate-hazard commercial and residential connections

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Pressure vacuum breakers — commonly used for irrigation systems

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Atmospheric vacuum breakers—for lower-risk hose bib and fixture connections

All installations are performed by our licensed plumbers and registered with the local water authority as required.

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Red fire hydrant and two smaller hydrants on a grassy roadside corner with pavement nearby

Backflow Certification

California regulations require backflow prevention devices to be certified by a certified professional. Superior 1 Plumbing issues compliance documentation and submits required reports to the water authority on your behalf. During the inspection, our certified technician inspects the device, measures pressure differentials across each valve, and verifies the assembly is functioning correctly. If any component is worn or failing, we repair or replace it on the spot to ensure continued protection and compliance.

Backflow Prevention Throughout Greater Los Angeles and the South Bay

Superior 1 Plumbing provides backflow prevention installation and repair in Greater Los Angeles and throughout our service area, including Hawthorne, El Segundo, Gardena, Lawndale, Redondo Beach, Manhattan Beach, Culver City, Torrance, Compton, Carson, Hermosa Beach, Santa Monica, and Lomita. Call (800) 921-2525 to schedule your backflow installation today.