View Full Version : Ro membrane noise
05/18/2005, 06:58 PM
I just changed my ro membrane. I increase from a 25 to 60 gpd.
I can hear a noise (hiss) at the flow restrictor. It doesn't seem to be air... but that is what it sounds like. The fitting is tight.
Any suggestions would be appreciated.
05/18/2005, 09:35 PM
You can't be sucking air in anywhere.
Water would leak out first.
What is your membrane pressure?
If high, that could contribute.
You now have 3 times as much water
being 'squirted' through the flow restrictor.
That's probably enough more that now it is
I should have asked this question first:
Did you get a FR-60 flow restrictor to match
the 60 GPD membrane?
05/19/2005, 12:55 AM
I did replace the flow restrictor. I think you are right. The increased flow is audible (when I put my ear on the housing). Thank you for your reply.
One question... while I have you here. I am adding another stage to my system. I have a 2 stage plus RO, and am adding another prefilter. Should I add a larger micron filter first?
I guess ideally what would be the best set-up for 3 filters pre-RO?
Thank you again
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