The O-ring is designed to fit specific parts within Graco pumps

reducing fatigue during extended painting sessions

and pressure cycles

Size: 1/4"

C.A Technologies By-Pass Regulator & Gauge for Pressure Cup aircompressor The O-ring is designed toThe C. A. Technologies by pass regulator and gauge (part # 52 5R2) is ideal for any pressure feed spray guns that do not have a ported head as a means of pressurizing the cup. The regulator connects to the air inlet fitting on most pressure feed spray guns (bottom of spray gun handle) and will allow for air regulation to the pressure cup while also allowing air pressure to pass through unregulated to the spray gun for atomization. We recommend 3 5 psi