Where are double check valve assemblies commonly used?

They are commonly used on irrigation systems, fire sprinkler systems, commercial buildings, and multi-unit properties.

Do double check valve assemblies require annual testing?

Many Florida municipalities require annual testing to verify the assembly is functioning properly and protecting the public water supply.

What Is a Double Check Valve Assembly?

Q: What is a double check valve assembly?

A double check valve assembly is a type of backflow preventer that uses two independently operating check valves to help prevent reverse water flow contamination.

Q: Can a double check valve assembly be repaired?

Many assemblies can be repaired by replacing worn components or cleaning internal valves, although severely damaged units may require replacement.

A double check valve assembly (DCVA) is a type of backflow prevention device designed to help protect clean drinking water from contamination caused by reverse water flow. These assemblies use two independently operating check valves to reduce the risk of contaminated water flowing backward into potable water systems.

Double check valve assemblies are commonly used on irrigation systems, fire sprinkler systems, commercial plumbing systems, and other low-to-medium hazard applications throughout Florida.

Schedule Backflow Testing Call Now: 954-530-0241

How a Double Check Valve Assembly Works

A DCVA contains two spring-loaded check valves installed in series inside the assembly body.

These valves allow water to flow in one direction while helping prevent reverse flow conditions that could contaminate drinking water lines.

If one valve begins to fail, the second valve provides additional protection.

Where Double Check Valve Assemblies Are Commonly Used

Application	Why a DCVA May Be Used
Irrigation systems	Helps protect against reverse water flow contamination
Commercial buildings	Protects potable water systems from cross-connections
Fire sprinkler systems	Helps isolate stagnant water from potable lines
Multi-unit properties	Supports cross-connection protection requirements

Why Annual Testing Is Often Required

Double check valve assemblies contain internal moving parts that naturally wear over time.

Many Florida municipalities and water authorities require annual testing to verify the assembly is still operating properly and protecting the public water supply.

Annual Testing May Help Identify

Valve failures
Pressure problems
Internal leaks
Debris buildup
Corrosion or deterioration

Helpful related guide: How Often Should a Backflow Preventer Be Tested?

Signs a Double Check Valve Assembly May Need Service

Visible Leaks

Water leaking around the assembly may indicate worn seals or failing valves.

Low Water Pressure

Internal restrictions may reduce flow through the assembly.

Unusual Noises

Humming or chattering may indicate valve instability or pressure fluctuations.

Failed Inspections

Failed testing may reveal internal wear or deteriorating components.

Can a Double Check Valve Assembly Be Repaired?

In many cases, yes.

Common repairs may include:

Replacing seals and internal components
Cleaning debris from valves
Repairing shutoff valves or fittings
Correcting pressure-related issues

Assemblies with severe corrosion or structural damage may require replacement instead.

Helpful Related Backflow Guides

Need Double Check Valve Assembly Testing or Repair?

Amy’s Plumbing provides certified backflow testing, repair, and replacement services for irrigation systems, commercial properties, HOAs, and multi-unit buildings throughout Broward County and nearby South Florida cities.

Schedule Backflow Service Call Now: 954-530-0241

Amy’s Plumbing
Florida Plumbing Contractor License: CFC1429784
Email: [email protected]