RO unit NEEDS HELP

mark · #1 10-05-2009, 01:19 PM

hooked up correctly, pre-filters need changing (what's the flow like after them), membrane shot, AVOS working, check valve okay, flush valve correct position? Check section by section.

Canadian · #2 10-05-2009, 03:50 PM

Definitely sounds like something is hooked up incorrectly.

On an unrelated note: I don't know if that schematic is of the unit in question but if it is keep in mind that the post-carbon will add TDS back into the water after it's been brought down to 0 by the DI.

sphelps · #3 10-05-2009, 04:06 PM

RO membrane could be bad. Recent ones from aquasafe have had faulty RO membranes. I've installed two bad ones this year, in both cases the system would only produce a minute amount of water each day, after checking everything I replaced the membrane and it fixed the problem.

thanhjenn · #4 10-05-2009, 04:41 PM

what is AVOS mark.

Quote:

Originally Posted by mark

hooked up correctly, pre-filters need changing (what's the flow like after them), membrane shot, AVOS working, check valve okay, flush valve correct position? Check section by section.

Oceanic · #5 10-05-2009, 07:55 PM

Quote:

Originally Posted by thanhjenn

what is AVOS mark.

I think he meant ASOV (Automatic Shut Off Valve)... Shuts unit off automatically when resevoir is full or back pressure is high enough.

mark · #6 10-05-2009, 08:49 PM

AVOS, that's the Weather stations we put on ships. Too many acronyms.

Yes meant ASOV

mark · #7 10-05-2009, 08:56 PM

and if you do need to order a membrane, seems the 75g might be the better deal.

see here

thanhjenn · #8 10-06-2009, 07:24 AM

So, i should buy a 70 gpd? Are all membrane universal? do i need to buy a flow restrictor also? is a pump booster a good idea also?

robert · #9 10-06-2009, 07:33 AM

Yes, buy 75 gpd membrane and restrictor. Restrictor is the key to keep flow at rated level for the membrane. Booster pump is a good idea if the pressure of your water supply is not adequate. I would start without it, save some $$$

. Measure the production level of your setup and see how far behind gpd you are.

Quote:

Originally Posted by thanhjenn

So, i should buy a 70 gpd? Are all membrane universal? do i need to buy a flow restrictor also? is a pump booster a good idea also?