Auto shut off valve problems

[onux20]

I need some help…again

 

I installed an auto shutoff valve on my RODI system. It had been working as advertised since installed a year ago maybe. Within the last month or so, I have noticed the water never shuts off. I replaced the shut off valve thinking it failed but no change. I just changed the check valve thinking that may have been it, still the water getting by. I have downloaded instructions and reinstalled as described.

 

Any ideas of why water is getting by?

 

Also, recently have low pressure thru the system. Used to be at the low end of the recommended range but now it is well below the ideal pressure. Any ideas of why or how to remedy short of a booster pump?

[steveoutlaw]

Can you give us a little more of a description? is this a float valve or a plug in shut off (can't remember the name)? Is it installed before the RODI or on the water line coming out of the membrane or DI?

[onux20]

Steve,

 

My setup feeds a top off reservoir, 2-3 g. Once that is full, it tees off to feed a 32 g Brute I use to make saltwater. Both are managed by individual float valves. Top off float lifts when full. Then water travels to 32 brute until that float lifts. Been run this way for about two years now that I think about it.

 

Shut off valve is located between the Ro and DI sections as required per the instructions.

[Origami]

I had a similar problem on my well, Ron, which runs at relatively low pressure. What I think was happening was that, even if the float valve in my reservoir was completely closed, there was enough leakage on the waste side of my RO membrane, that there was never sufficient pressure on the clean side of the membrane (between the RO and DI stages) to force the ASOV closed. Do you see something similar (that is, your reservoir is closed and there's still waste water flowing down the sink)?

 

I never got this completely solved using the ASOV - even with a booster pump (because the booster pump would cycle for as much as 20 minutes before shutting down). Instead, I now use an Avast ATO as a level sensor in my reservoir and use it to shut down a solenoid valve on the water supply when the reservoir is full.