Internal Relief Fittings – 1/4″ NPT

The 1/4″ NPT Internal Relief Fitting (Part No: IR1N4-CS) is an inline safety component designed to manage overpressure scenarios between 150 to 400 PSI. Its internal architecture features a compact spring-loaded mechanism consisting of a spring guide, sealing ball, seat seal, and base washer to ensure reliable pressure relief in tight plumbing configurations.