So I have a question for those of you that offer fleetwashing. I have an ro/di and multiple legtanks I can set up. My question is do I need a dedicated machine to get a spot free rinse. Or is it as simple as keeping an extra leg tank for pure water and switching tanks with a ball valve. I have very high tds in my area so my concern is that my plumbing, pump, pw hose, etc might contain solids/ residue from the high tds.