Polycarbonate locking knob 10.4 Accurate pressure regulation with maximum water and dirt separation are provided in a single, compact unit The filter significantly increases the life of expensive equipment The regulator employs a solid piston which resists rupture, cracking or tearing under pressure or high cycle rates Tru-Flate Regulators have fast flow capabilities Maximum operating pressures are: 150 PSI at 125 degrees F primary, 2 to 125 PSI secondary with polycarbonate bowls; N 65 Automatic Float 40 5 oz. Port size: 3/8 in. NPTF