RO Unit Flow Restrictor Question

DownTown

New member
Hi Guys... Looking for your help...

A few weeks ago, my RO output dropped significantly, from about 4 GPH to about 2 GPH. This is using a particle cartridge, 2 carbons, the RO, and a DI. It is a 100 GPD unit, and I have a booster pump that delivers about 85 PSI to the RO membrane. Assuming that the problem was a clogged cartridge, I started by replacing the less expensive cartridges, and then the DI, and the RO membrane itself. Replacing the RO membrane seemed to solve the problem, and I was back up to 4 GPH.

One night last week, I was making a batch of water, and came down stairs to find the living room flooded. I found that there was water squirting out of the waste water fitting on the RO membrane. I figured that it was a bad John Guest fitting. When I replaced the fitting, the new one did the same thing. I did notice that that fitting is where the flow restrictor is. I am now wondering if that is the correct place for the flow restrictor. When I remove the restrictor, there is no leaking. What is the down side of running with no restrictor? Is this the correct place for the restrictor to be? I read that it should be on the product water side...

Thanks for your help.

Dave Town
 
It belongs on the waste side.
Without it the pressure across the membrane will not be right and the unit will not work properly.
 
Thanks Kshack... anyone have thoughts on why the fitting leaks when the restrictor is in place, or what I can do to fix it?

D.T.
 
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