DIY Electric shut-off valve

[Brilliant]

Originally Posted by Ken73

Hi Guys, just out of curiosity, is there an advantage of this setup over using a regular Kent Marine float valve? I've got my trash-can RO setup with a mechanical float valve on it, and it's been doing fine.

The float valve is for overflow.

This solenoid is to prevent the "waste water" from flowing after the float valve kicks off...because most units still flow. My "auto-shutoff-valve" was actually causing me grief with output so I removed it and went with a solenoid and timer.

Basically the auto-shut-off valve or this setup posted here should be used to conserve water and prevent "waste water" from flowing constantly. The float valve does not stop waste water from flowing (unless your auto-shut-off valve is working properly).

[Ken73]

OK, so your RO unit doesn't have an auto-shutoff on it? I just bought a household drinking water RO unit from Lowe's, and it has a built-in auto-shutoff valve in it. Or am I misunderstanding it? I plumbed the output up to the trash can with the float valve. When it's filled up the trashcan, it shuts it off, then the undersink reservoir fills up and the RO unit stops, and doesn't waste any more water.

I bought the unit from Lowe's because I'm running it for drinking water as well as my ice maker - I made the trashcan reservoir for water changes (and it works wonders!)

[Brilliant]

Originally Posted by Ken73

OK, so your RO unit doesn't have an auto-shutoff on it? I just bought a household drinking water RO unit from Lowe's, and it has a built-in auto-shutoff valve in it. Or am I misunderstanding it? I plumbed the output up to the trash can with the float valve. When it's filled up the trashcan, it shuts it off, then the undersink reservoir fills up and the RO unit stops, and doesn't waste any more water.

I bought the unit from Lowe's because I'm running it for drinking water as well as my ice maker - I made the trashcan reservoir for water changes (and it works wonders!)

Yes the auto-shutoff valve will be fine. Mine started acting up.

If your always applying pressure to the unit the auto-shutoff will be fine. I was turning my water to the unit off and on and it got stuck.

I have a unit under my sink for drinking water and its fine with the water always on...its using the auto-shutoff valve.