I wouldn't advise that set up. to easy for it to fail and dump fresh water to the tank. what you could do is add a float valve at the end that is in the sump, and right befor that one of them pressure mechanical RO shut off's to give you double safty. this way if your selinoid sticks the float valve is still able to shut off the water through the mechanical shut off. Sorry but after working with electric selinoids for 20 years I am still leary of them on there own.
Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*
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