Backflow prevention helps protect the public water supply from contamination. Many commercial, irrigation, fire-service, and certain residential backflow assemblies must be tested on a recurring basis under the requirements of the local water provider. Ace Pelizon Plumbing provides certified backflow testing, repair, rebuild, and replacement services throughout the San Gabriel Valley and Inland Empire.
What Is Backflow and Why Does It Matter?
Backflow occurs when water flows in the wrong direction through your plumbing system — bringing non-potable water (irrigation water, industrial water, sewage) back into the clean water supply. It happens when water pressure drops or reverses due to back-siphonage or back-pressure. A properly functioning backflow prevention assembly stops this from happening. Annual testing ensures yours is still doing its job.
Types of Backflow Assemblies We Test and Service
- Reduced Pressure Zone (RPZ) assemblies — required for high-hazard connections including irrigation, fire suppression, and industrial uses
- Double Check Valve (DC) assemblies — used for low-to-moderate hazard commercial applications
- Pressure Vacuum Breakers (PVB) — common on residential and commercial irrigation systems
- Spill-Resistant Vacuum Breakers (SVB) — used where spillage is a concern
- Atmospheric Vacuum Breakers (AVB) — low-cost option for lower-hazard applications
- Fire sprinkler backflow assemblies — required annually for all fire suppression systems
- Domestic water backflow assemblies — building water supply protection
- Irrigation backflow assemblies — required on all commercial and many residential irrigation systems
Annual Backflow Testing and Compliance
Many local water providers require backflow prevention assemblies to be tested annually by a certified tester. Testing deadlines, reporting procedures, and device requirements can vary by water district and property type.
Why Backflow Assemblies Fail
Backflow prevention assemblies are mechanical devices designed to protect the public water supply, and like any mechanical device, they wear over time. Inside every assembly are springs, rubber seals, check valves, seats, and relief valves that are constantly exposed to water pressure, minerals, and debris. As these internal components age, the assembly may no longer operate within the manufacturer's specifications and can fail its required certification test.
Ace Pelizon Plumbing can test the assembly, document the results, and help coordinate the required paperwork based on the requirements of your water provider. If the assembly fails, we'll explain the results and provide repair or replacement options before additional work begins.
Backflow Repair, Rebuild & Replacement
If your backflow assembly fails testing, it must be repaired or replaced before re-testing. We carry common repair parts on our trucks and can often complete a repair and re-test in the same visit. Our services include:
- Backflow assembly repair
- Full backflow rebuild (valve seats, springs, disc assemblies)
- Backflow preventer replacement
- New backflow assembly installation
- Annual test report filing with local water authority
- Multi-property portfolio management for property managers
If Ace Pelizon Plumbing performs the initial backflow test and the assembly fails, we will retest the device at no additional charge after we complete the approved repair or replacement.
Brass vs. Composite Backflow Preventers
Not all backflow preventers are built from the same materials. The two most common options are traditional brass assemblies and newer composite (often referred to as epoxy or engineered polymer) assemblies. Each has advantages depending on the property's needs and level of theft risk.
| Brass Backflow Preventers | Composite (Epoxy/Engineered Polymer) |
|---|---|
| ✓ Extremely durable construction | ✓ Lightweight, corrosion-resistant construction |
| ✓ Longer expected service life (often 25–30+ years with proper maintenance) | ✓ Typical service life of approximately 15–20 years with proper maintenance |
| ✓ Excellent for high-use commercial applications | ✓ Ideal where theft is a concern because they have little scrap value |
| ✕ Frequently targeted by metal thieves | ✓ Not commonly stolen for scrap |
| Higher initial cost but excellent long-term durability. | Often a smart choice for properties with repeated theft or vandalism. |
Ace Pelizon Plumbing installs both brass and composite backflow assemblies. We'll explain the advantages of each and recommend the best option based on your property's location, theft history, budget, and long-term maintenance goals.
Common Backflow Problems We Solve
- Annual backflow certification failures
- Leaking relief valves
- Corroded or leaking shutoff valves
- Frozen and damaged backflow assemblies
- Stolen backflow preventers
- Same-day backflow replacement after theft or vandalism
- Backflow preventer rebuilds
- Failed fire service backflow assemblies
- Damaged irrigation backflow devices
- Inoperable test cocks
- Backflow security cage installation
Who Needs Annual Backflow Testing?
Most commercial properties are required by law to have their backflow assemblies tested annually. This includes office buildings, retail centers, restaurants, hotels, industrial facilities, HOA common areas, car washes, auto dealerships, schools, hospitals, and any property with an irrigation system, fire suppression system, or connection to a water source other than the domestic supply.
Many residential properties with irrigation systems, pools, or spas are also required to have backflow assemblies tested annually. If you're not sure whether your property requires testing, call us — we'll tell you exactly what's required for your specific connection type and water authority.
Commercial & Multi-Property Backflow Programs
For property managers and HOAs with multiple assemblies across multiple properties, we offer portfolio management programs. We track your testing schedule, coordinate access with your tenants, complete all testing, submit all reports, and provide you with a consolidated compliance record. One call handles everything.