PART NO : AB8436 The MV-3 dash control module combines the functions of a PP-1 control valve and a PP-7 trailer supply valve together into one device. The module is 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. MODEL:MV3 TRAILER DELIVERY:1/4" NPT RESERVOIRS:1/4" NPT (2) EXHAUST:1/4" NPT TRACTOR DELIVERY:1/4" NPT AUXILIARY SUPPLY:1/4" NPT TRACTOR VALVE:20 - 35 PSI TRAILER VALVE:20 - 45 PSI CROSS REFERENCES:106981, 20QE3316M2, 800259, 800515, 5002205, 5005646, ABC5005646, KN20601, N4400EA - N4400C, 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.