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No blood needed. I decided to go against what Arimitsu said and put a new seal kit in the pump. They were definitely worn but not leaking. All seems to be fine now, no -pressure change between functions. Thanks to everyone and no goats harmed.

Gravity for wax and soap, city pressure on rinse

Yes, we use hot water. That was my thought also so I switched supply lines form another bay, no change. I can run all 5 other bays at the same time and not have a supply issue. But even running this one today alone has same problem. Thanks for the reply

I have an Arimitsu 309 cavitating and losing about 100 psi when high pressure wax or soap is selected in the bay. Switching between HP rinse and soap/wax is a noticeable difference. I have replaced all lines with new and switched supply lines from another bay that was working correctly and...

I have just replaced an Yamada 15 series on our foam brush that, from what I could tell, was around 7 years old. Using the same pump model and setup that had worked, now it stalls out after the service shuts off. Yamada said to tighten the bolts through the pump, did that, actually made it...

I appreciate all the help and direction from everyone. I have resolved the problem, I disassembled the the whole membrane system today to see what I could find out of place and luck have it I found one of two o-rings that seal the membrane to the bottom canister head on the last canister I took...

I will adjust system to this tomorrow if possible on the unit. I check TDS before it mixes with the storage tank.

I have switched out membranes with the old ones still in good shape, one at a time. I'm testing with a new tds meter w/temperature compensation and the old one at the same time. I do get more water spots than I like on a air dried car.

I have inherited a problem at a 6-ss and 2-iba wash I have started working at. I'm completely new to this industry and have enjoyed learning about it except for the R.O. system problem that wont go away. I don't know the manufacture of the system and believe it is a combination of a couple...