PART NO : AB8466 The MV3 dash control module combines the functions of a PP1 control valve and a PP7 trailer supply valve together into one device. It's a two button, push-pull control valve housed in a single body which includes a dual circuit supply valve and a check valve. The MV-3 valve can duplicate the functions of any existing two or three valve push-pull system and has the advantage of reduced plumbing. Tractor Valve: 20 - 35 PSITrailer Valve: 20 - 45 PSINon-Override: 25 ± 5 PSI MODEL:MV2MV3 TRAILER DELIVERY:1/4" RESERVOIRS (2):1/4" EXHAUST:1/4" AUXILIARY SUPPLY:1/4" CROSS REFERENCES:5005079, MVB4615T, N4400EK, N4400, 101437, 101437N, 102027, K095875, 340106, 14309481, 15503262, KN20615, 479301390B, 42042575, K101437, 20QE3187M, 20QE3187RM, 745-101890, 503140C91, 90004988, AV101437, 321569, 401232, 1600664, G15503262, MV-2, MV-3A cross reference listing means that this valve is a suitable replacement for the part numbers listed. Some changes in air line plumbing may be required.