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Sep 23rd, 07, 09:27 PM
I built a unit with garage door openers and relays once and it worked good but sometimes the signal could not reach the equipment because the trailers blocked it so I stopped using it after a few years(wasn't worth the maint).
The one thing I did do for chem switching that did work good was use extension cord with a three way switch to go step 1/step 2/ off... that worked good. Eventually I just settled on the 2 man crew 1 guy step 1, one guy step 2 then both rinse back or 1 soap-1 rinse.
Getting back to the question...Dema makes some banked manifolds, but be careful what you wish for you just might have spend your time fixing it.
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