Graco Back Pressure Regulator, Low Pressure Corrosion Resistant, 15 GPM (56.7 lpm), 180 Max psi, Manual, 1-1/4 (f) x 1-1/4 (f), with Gauge

Graco 1:3 Precision Flow Fluid Pressure Regulator, 30 psi (2.0 bar) max pressure, black ratio spacer

Graco 1:1 Precision Flow Fluid Pressure Regulator - 90 PSI Silver Ratio Spacer