Eddington Check Valves

Check valves used in our water treatment equipment are convenient ways to have equipment show up on the job site ready to install.  Any check valve can be purchased pre-installed or stand alone.

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Inline Check Valve from Eddington

Poppet type, zero leak, inline check valves for liquid and gas applications to 3000 psig. Fully retained O’ring seal design permits full rated pressure in the checked direction. This check valve is offered with fully interchangeable dual ferrule tube or metal to metal face seal connections. A variety of crack pressures and seal materials, combined with a metal to metal positive stop provides long trouble free service life in the most demanding applications.


  • Working Pressures to 3000 Psig (206 bar).
  • Full Pressure Rating in Check Direction.
  • Fully Retained O’Ring Seal.
  • Dual Ferrule Tube, Female NPT, Male NPT and Face Seal Connections Available.
  • Cracking Pressures from 0.3 to 25 Psig (0.02 – 1.7 bar).
  • 100% Factory tested for crack, leakage and reseal performance.

Available Materials:

Component                                                      Brass Valve Body                   Stainless Steel Valve Body.

Inlet Cap, Outlet Body, poppet:                  Brass (ASTM B16)                 Type 316 SS (ASTM A479).

O Ring Retainer:                                                        Type 316 Stainless Steel (ASTM A479).

Spring:                                                                         Type 302 Stainless Steel (ASTM A313).

O Ring Seal:                                                          Buna-N                                             Viton.

**Call us for check valves made from the following materials:

Monel, Hastelloy, Alloy 20, Duplex Stainless Steel, and Inconel.

How does Eddington Uses Check Valves on our water treatment products?

Wouldn’t it be nice to receive a corporation stop with a 1/2″ FNPT check valve ready to be hooked up directly to the pump side 1/2″ connection?  We also offer them on our retractable injection quills.

Multi port injection quills from Eddington are an application where check valves are recommended.  These units come with ball valves followed by a check valve on the pump side for easy maintenance and replacement of the quill.

Of course you can purchase our check valves as stand alone or already installed on the unit.

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