I am new to the ss car wash business and my main question now is about setting up my soap injection. I have a soap tank that sets higher than the pumps. It comes out of the tank with 3/4 pvc and runs over to the pump stand where they have it reduced to 1/4" pipe, it runs through a valve and into the injection port on a 323 Cat pump. Do i need to dilute the soap that is in the tank or do i need to regulate the amount of soap at the pump (using the valve or ?) Thanks for any and all help.