Quote:
Originally Posted by StirCrazy
there can't be any air goi ng into that or it will reduce the vaccume which is required to hole the water colume up in the tank. Personaly I think it is done with Mirors other wise he would need to plumb a vaccume pump into the top of the tall tank to remove air and maintain the vaccume.
Steve
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Has to be this.
And too risky for me. A pump/power/check valve failure means a lot of mopping...