pressure in the area of 6-1/2 8 psi a regulator is not required 130 gph pumps are ... is between 7-1/2 9 psi a pressure regulator is definitely required both the 110 gph ... pressure is pre-set to 7 psi and a regulator is not required the blue pump p/n12- ... pressure is pre-set at 14 psi and a regulator is included as part of the package ... gph and is designed to work with either gas or alcohol fuels this one is similar to ... volumax pumps are available for gasoline or alcohol fuels they are p/n 12-705-1 ... pre-set at 15 psi and both a pressure regulator and 3/8 return line to the tank are ... output of these pumps make them the natural choice for racers who will settle for ...