Back Flushing RO Membrane

Jaws · #1 08-21-2008, 03:34 AM

Hey guys. I'm getting my RODI unit going after sitting for a while and I thought it would be a good idea to back flush the RO membrane. I've got new carbon and micron filters so I thought I'd try backwashing the RO membrane before I replace it. It doesn't make much sense to me but I made a small batch of water up using the RO filter before I've replaced any filters and the TDS reading was higher after being filtered than it was coming out of the tap. Does that sound right to anyone else? I even let the water flush the filter for a few hours before starting a fresh sample to test.

Can anyone explain to me how I do a back flush? It's probably easy but I don't want to blow any seals or anything. Thanks.

Sebae again · #2 08-21-2008, 05:28 AM

Just a thought,but maybe it was in the backflush position to begin with or there are particles from the new filter / old ro membrane ( if it had dried out ).

jpdutton · #3 08-21-2008, 02:51 PM

I don't know what you mean by back flushing???

I hope you don't mean you are trying to push water through it from the exit? If you did this you probably ruined your membrain.

What you want to to is flush the membrain. flushing works by bypassing the flow restrictor on your RO system and allowing a fast high speed flow of water to pass over the membrane surface and clean off any debris or scale that would otherwise clogg and shorten the life span of your RO membrane.

jpdutton · #4 08-21-2008, 02:58 PM

If you don't have a flush kit and want to do it mannualy, you have to take out the flow restrictor and then let the water flow as it does regularily but at a higher speed.

or you could grab one of these:
http://www.shopbwirrigation.com/inde...&productId=406