Solenoid in RO line

[billw]

I'm exploring designs for a degasing function for my DI water system. Is there anything, material wise that would cause a problem that I should look out for using a standard brass solenoid to control flow from the RO membrane?

 

[Randy Holmes-Farley Verified Community Expert]

Wouldn't the solenoid be put before the membrane? If so, anything is OK.

 

[Greybeard]

My solenoid is _after_ the RO/DI filter... for my setup, it has to be.

Got my 110vac, 1/4" quick connect solenoid valve from AirWaterIce, no metal in contact with water flow. Works great.

In my setup, output after RO membrane is split, going to a 5g pressure tank that feeds my ice maker and drinking water faucet. The other 't' feeds through the DI cart, and runs to my mixing station and ATO reservoir. The ATO reservoir has the solenoid on it, only enabled for 2 hours, twice a week. From there to a float valve, with a normally dry float switch above that, in case the float valve fails. This way, I use most of the 5g reservoir, and then refill it, rather than starting/stopping the RO/DI every time my ATO unit uses a little water. Running the RO/DI for very short periods of time doesn't produce the best results.

 

[billw]

Wouldn't the solenoid be put before the membrane? If so, anything is OK.

The plan to degas in my 35G collection tank then pump the membrane water through the DI resins and into the on-line top off tank. I would need the solenoid to provide shutoff pressure at the input of the collection tank (output of the membrane) as I empty it into my on-line tank. I didn't think of putting it prior to the membrane, that sounds like a good new plan "A"! Thanks!

 

[billw]

My solenoid is _after_ the RO/DI filter... for my setup, it has to be.

Got my 110vac, 1/4" quick connect solenoid valve from AirWaterIce, no metal in contact with water flow. Works great.

In my setup, output after RO membrane is split, going to a 5g pressure tank that feeds my ice maker and drinking water faucet. The other 't' feeds through the DI cart, and runs to my mixing station and ATO reservoir. The ATO reservoir has the solenoid on it, only enabled for 2 hours, twice a week. From there to a float valve, with a normally dry float switch above that, in case the float valve fails. This way, I use most of the 5g reservoir, and then refill it, rather than starting/stopping the RO/DI every time my ATO unit uses a little water. Running the RO/DI for very short periods of time doesn't produce the best results.

Thanks Greybeard! I'll check out AW&I!