... under load, and an auto-off disconnect lever for manual cut off the compressor. A four port manifold style is available ... -1H1, TH10-1H2, TH10-1H3 Min on (cut-in) PSI 25, 35, 50 Max off (Cut-out) PSI 100, 150, 175 Differential PSI ... -4H1, TH10-4H2, TH10-4H3 Min on (cut-in) PSI 25, 35, 50 Max off (Cut-out) PSI 100, 150, 175 Differential PSI ...