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OPW 71SO-T Testable Overfill Prevention Valve


What’s different about the 71SO-T?  OPW’s 71SO-T Overfill Prevention Valve is the only UST Overfill Prevention Valve that is testable from the surface….without removal from the tank, which allows operators to test in 60 seconds vs. 60 minutes per tank.

The 71SO-T is the easiest, quickest, most cost efficient way to ensure that your overfill valves will operate when called upon, verifiable without removing them from the tanks.

Testing and Verification can be done in 3 easy steps:

  • Loosen the test plug
  • Lift the float with the cable to simulate fill
  • Validate the proper poppet operation

Features & Benefits

The new 71SO-T Testable Overfill Prevention Valve makes testing and verification of proper operation quick and easy. Here’s how it works:

  • The only UST Overfill Prevention Valve that is testable without removal from the tank
    • A testable feature is attached to a sealed plug in the inlet adapter

  • The plug is easily accessed with a standard socket extension

  • Attached to the extension, the testable feature can be raised and lowered, allowing the user to inspect the valve operation from the inside of the tube

  • The plug is then easily reinstalled to the inlet adapter from grade

  • No fill components, overfill valves, or vapor tight seals have to be removed – avoids compromising vapor tight compliance

  • The Testable 71SO-T uses the same industry leading overfill prevention technology for strong vapor tight compliance

Weight 16 lbs
Dimensions 144 × 6 × 6 in
Bury Depth

5', 10'

Tank Diameter

8', 10', 12'

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