125P Series 1/8 pipe Push Button Valves feature the classic Humphrey diaphragm poppet principle. The unbalanced, air-spring return design assures bubble-tight sealing at rest and actuated. Compact design permits close proximity mounting to work and fast cycling/quick exhaust. Rugged 2- or 3- way valves are available normally closed or open. Standard or optional brass body suitable for inline, base or panel mounting.