Order by sku

PVC True Union Flapper Check Valve - Spring - Clear

  • Size(s): 1-Inch, 1-1/4-Inch, 1-1/2-Inch, 2-Inch
  • Color(s): White, Clear
  • End Connection(s): True Union Socket x Socket
  • Schedule: 40
  • Working Pressure: 150 PSI @ 73° F
  • Functionality: Installs with standard PVC glue
  • Material Body: PVC
  • Material Seal: EPDM
  • Country of Origin: United States

Availability: In stock

8610CSPVC True Union Flapper Check Valve - Spring - Clear - Socket x Socket - 1-Inch (12/Cs)
8614CSPVC True Union Flapper Check Valve - Spring - Clear - Socket x Socket - 1-1/4-Inch (12/Cs)
8615CSPVC True Union Flapper Check Valve - Spring - Clear - Socket x Socket - 1-1/2-Inch (12/Cs)
8620CSPVC True Union Flapper Check Valve - Spring - Clear - Socket x Socket - 2-Inch (12/Cs)

* Required Fields

Stylistic Specifications

Operational Specifications

Color(s): Clear

Sizes: 1-Inch - 2-Inch

True Union Socket End-Connectors


Rated at 150 PSI @ 73° F

Flapper opens with 1/2-lb. of pressure

Stainless Steel Spring-Loaded Flapper

Quiet Operation

Product Description


RedFlag Products Check Valves are the highest quality and best made check valves available and can fit any application. Rigorously tested for durability, this comprehensive line of products provides reliable back-flow prevention during regular back-washing, unplanned power outages, or other water system related events, and will not burden your system with inline flow restriction like other, similar check valves.

There are several styles of Check Valves to ensure the correct parts are available for every installation.  These valves come in sizes ranging from 1/2-Inch through 3-Inch, with available socket, threaded, and true union end-connections. Our full line of PVC Flapper Check Valves is available in both spring-loaded and springless configurations.

Rigorous stress testing and a highly consistent manufacturing process provide reliability and years of issue-free, outstanding performance.  Our Flapper Check Valves are manufactured with 100% virgin PVC resin and utilize the RedFlag Products high quality injection molding process.  Great for long term and high stress installations where durability is required.

Schedule 40, socket (solvent) fittings glue in place, while threaded end-connectors allow for connection to Male Pipe Thread (MPT).  Installation instructions can be found in the “Commonly Asked Questions” section below.

Industries: Aquarium, commercial plumbing, drainage, fluid handling, fountain, graywater harvesting, hydroponics, industrial & scientific, irrigation, lawn & garden, pond, pool, ranch, residential plumbing, spa, sprinkler, rainwater harvesting, water tank

  • Reliable back-flow prevention protects your pump
  • Reduced in-line flow restriction
  • An industry favorite due to added durability, thick walls, and high quality materials
  • Glues or threads directly onto pipe with Male Pipe Threads
  • Comes ready to install in the widest variety of configurations, sizes and styles to choose from
  • Virgin, high-quality material is used throughout the valve
  • Seals are manufactured using high quality EPDM rubber

Commonly Asked Questions

More info coming soon!



Prop. 65 Warning

WARNING: This product can expose you to chemicals including titanium dioxide which is known to the State of California to cause cancer. For more information go to