It is suggested to use a Safety Blowoff Valve with a PSI rating between 25-35 PSI higher than the maximum pressure of the pressure switch.
HornBlasters 2 Gallon 6 Port Air Tank with Fitting Kit - TA-206H-442 Designed to maximize airflow, HornBlaster's 2 Gallon Tank features four 1/4 ports and two 1/2 ports, with ports on the side, top, bottom, and end caps for ease of installation. For example, 150 PSI systems require a 175 PSI Safety Blowoff and 120 PSI systems require a 150 PSI Safety Blowoff. HornAir 2 Gallon Air Tank with Fitting Kit;Single 1/4 compressors;1/4 Air line;Powdercoated black finish;Interior coated with a rust inhibitor;1/4 NPT ports: 4;1/2 NPT ports: 2;Volume: 2 Gallons;Burst pressure: 400 PSI;Working pressure: 200 PSI;Meets SAE J10 & FMVSS 121 specifications;Made in the USA;California Residents: WARNING This tank is finished with a semi-gloss black powder coat to resist corrosion and the inside of the tank is coated with a rust inhibitor.