Rinse manifold flow question.

[1carwash1]

I was thinking of using this stainless manifold for a direct-fed rinse application. The stainless pipe has a 1-inch opening on the inlet and the outlets are 3/8.
I will be configuring this for 7 bays, cat 2120 pmps, 3HP motors, and 2505 wand tips. Additionally the high-pressure soap and wax will be gravity fed. Do you think the 3/8 openings are big enough to accommodate the feed water flow to the pump inlet or will the pump be starved?

 

[MEP001]

3/8" off a 1" ID pipe should be plenty. You'll want to feed the line with 1" hose to make sure it gets plenty of water, but even if it doesn't it won't cause any issues, your pumps will just get some hot water on the rinse function.