RO/DI Auto Shutoff Problem

[Saboral]

I have hooked an auto shutoff valve into my RO/DI unit and it won't seem to ever turn off the unit.

The unit is an Air, Water, and Ice 75gpd RO/DI unit. It has the 550 flow restrictor on the waste line. When I turn off the valve on the product line the waste line continues to output water.

The auto shutoff valve is attached as follows:

IN-()-OUT

Tap Water-()-Prefilters {TOP}

Purified Water-[Check Valve]-()-Float Valve {BOTTOM}


()=Auto Shutoff Valve

I think the flow restrictor is allowing too much pressure to escape from the waste port of the membrane, resulting in too little pressure on the pure water side of the membrane to trigger the valve. Any ideas? Anyone had this issue before?

 

[Rizup]

How long did you wait for it to shut off? It takes a little while before it actually shuts off.

 

[patsfan1130]

Agreed. they can take up to 10 minutes or so to fully shut down

 

[Mike31154]

Yow, I was wondering the same thing, waste water keeps going and over filled my waste water container. I think it ran for more than 10 minutes after the float switch activated. Never waited longer to see if it would stop.