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[whatcaneyedo]

Originally Posted by warriorcookie

Where did you get your solenoids?

I'm having difficulty finding solenoids that are entirely plastic, no metal...

Have you tried looking on ebay? That is where I found mine.

The manufacturer of my RO/DI recommends that it run for several hours at a time. Short run times are apparently damaging or at least reduce the lifespan (or maybe effectiveness? I don't remember why exactly) of the membrane.

I've had problems with sensors, valves and solenoids sticking either on or off in the 9 years that I've been doing this. By storing a few days worth of purified water in a separate container and pumping it to my main tank I minimize the risk of over diluting my tank. I've known a few people who have overflown their tanks or flooded their homes with either poor design or neglect.

My RO/DI unit is 30' from my tank and I was able to run a water line to it so I'm not sure about what the rest of you are talking about.