stlowburban
+1y
bigjon is right, doesn't matter what it is, pressure is pressure. Most car systems ( at least in the old days) run up to about 6000 psi. The tank on the pump however does not see this pressure. You can leave the cap off and it works fine, although it gets pretty messy. I would definately get it from a company that makes and or deals with acrylic tanks and knows how they are pressure rated. You would not want it blowing up as the shrapnel would not be good.