Backflow Testing & Repair in Jacksonville, Orange Park & Clay County, FL

If your property has a backflow prevention assembly, your water utility likely requires it to be tested on a regular schedule, typically once a year. Lance Maxwell Plumbing provides backflow testing, repair, and replacement for homes, HOAs, and businesses across Jacksonville, Orange Park, and the rest of Clay, Duval, and St. Johns counties. We’ve been a locally owned plumbing company here since 1994, and we make annual backflow compliance simple.

Schedule backflow testing and we’ll get you on the calendar.

What Is a Backflow Preventer?

A backflow preventer is a device that keeps water flowing in only one direction, from the public water supply into your property. If pressure in the public system drops, for example during a main break or heavy firefighting demand, water from your property could be pulled backward into the supply. A backflow preventer stops that from happening and protects the drinking water for you and your neighbors.

Who Needs Backflow Testing?

Backflow assemblies are common on:

Lawn irrigation systems, including those on reclaimed water
Fire sprinkler systems in commercial buildings and some residences
Commercial properties like restaurants, medical offices, and car washes
Multifamily buildings and HOA common areas
Pools, boilers, and other equipment connected to the water supply

If you received a backflow testing notice from your water utility, that’s your signal it’s time to schedule.

Our Backflow Services

Annual Backflow Testing

We test your assembly to confirm its check valves and relief valve are holding and opening as designed. You’ll know right away whether it passed.

Backflow Repair

If your assembly fails, the most common causes are worn rubber parts, debris in the check valves, or a stuck relief valve. We repair the device and retest it to confirm it passes.

Backflow Replacement

When an assembly is too old, damaged, or not worth repairing, we replace it with a new, code-compliant device and test it before we leave.

Common Types of Backflow Assemblies

Reduced Pressure Zone (RPZ) assemblies provide the highest level of protection and are common on commercial properties and high-hazard connections.
Double Check Valve assemblies are used on many fire sprinkler and lower-hazard connections.
Pressure Vacuum Breakers (PVB) are common on residential irrigation systems.

Not sure which one you have? We’ll identify it during the test.

Signs Your Backflow Preventer Needs Attention

Water dripping or discharging from the relief valve
Low water pressure to the irrigation or sprinkler system
Discolored water or unusual taste after irrigation runs
Visible damage, corrosion, or a freeze-cracked body
A failed test result or overdue testing notice

Backflow Testing for Property Managers & Businesses

Managing backflow compliance across multiple properties is one more deadline to track. We work with property managers, HOAs, and business owners to keep assemblies tested and repaired on schedule. Learn more about our commercial plumbing services for property managers and businesses.

Why Choose Lance Maxwell Plumbing for Backflow Testing?

Locally owned since 1994. More than 30 years serving Orange Park, Jacksonville, and Clay County.
Best of Clay winner four years running, 2021 through 2024.
Testing, repair, and replacement from one company, so a failed test doesn’t mean finding another contractor.
Residential and commercial backflow service.

Backflow Testing Across Clay, Duval & St. Johns Counties

We provide backflow testing and repair throughout Orange Park, Fleming Island, Middleburg, Green Cove Springs, and Julington Creek, plus Jacksonville neighborhoods including Oakleaf Plantation, Deerwood, Baymeadows, Mandarin, and Argyle Forest.

Backflow Testing FAQs

How often does a backflow preventer need to be tested?

Most water utilities in Northeast Florida require backflow assemblies to be tested at least once a year. Some high-hazard connections may need more frequent testing. Your utility’s notice will list your deadline.

How long does a backflow test take?

A standard test usually takes well under an hour per assembly, though repairs add time. Water to the protected system is briefly shut off during the test.

What happens if my backflow preventer fails?

The assembly needs to be repaired or replaced and retested. We can usually handle the repair on the spot or schedule it quickly so you stay in compliance.

Do residential irrigation systems need backflow testing?

Many do, especially systems connected to the potable water supply or reclaimed water. Check your utility notice, or ask us and we’ll help you find out.

How much does backflow testing cost?

Pricing depends on the type and size of the assembly and how many devices are on the property. We’ll quote it before we schedule.

Stay Compliant With Annual Backflow Testing

Got a testing notice from your utility, or need a failed device repaired? Contact us to schedule backflow testing in Jacksonville, Orange Park, or anywhere in Clay, Duval, and St. Johns counties.