Short version of me requiring to make this post…
I have two GX390’s - one has a direct drive 15LPM @ 4000psi, the other has a reduction box and 18LPM (I think) @ 3000psi.
I tried the direct drive with an elevated buffer tank and bypass back to tank. It works, just low pressure. Can’t get over 3000psi. Attach to mains, 4000psi returns. I’m guessing that the direct drive doesn’t pull water, so the gravity fed supply is enough to work, just not forced enough for pressure.
I’d like to know if I can mains feed it, take the bypass to the tank - and then RETURN from the tank to the spare port on my inlet filter where the mains comes in?
I want to do this to use the tank as a radiator to cool the bypass water as opposed to going back to a short coiled hose which it had.
I wonder if the bypass, being fed mains pressure will just fill the tank, and the return from the tank won’t work unless the lid is on and pressurised… which is obviously not possible.
(The second machine will be using the tank feed as it sucks water just fine, unlike the literal direct drive).
Tanks in advance (yes, tanks!)