RO Membrane Replacement

[AEIOU9]

So I decided to replace my 3 year old RO membrane last week and wasn't getting any water coming out of the RO line only the waste line.

I did some searching and saw that not replacing the flow restrictor could be a problem so I ordered a replacement from Spectrapure, replaced it...same problem.

I also tried taking out the RO membrane and re-positioning it several times - no dice there.

So now I'm wondering if the culprit is the replacement RO membrane itself. When I originally purchased my filter I didn't have a good sense of how long an RO membrane could last so I bought a spare one with my unit. So effectively this replacement membrane has been sitting sealed in its bag for 3 years. Could this be the issue? Any other thoughts on the issue?

I have a Spectrapure 3 stage 90 GPD RO/DI unit if that helps.

 

[outy]

How much pressure are you running through it? Check all other lines are free and flowing.

Any chance a line could have been moved to the wrong place?

 

[AEIOU9]

How much pressure are you running through it? Check all other lines are free and flowing.

Any chance a line could have been moved to the wrong place?

Pressure is at 80 and I'm confident there are no misplaced lines and everything except the RO out is flowing well.

 

[outy]

Id pull the elbow of the RO housing just to check something isn't blocking it.

Its not like 2 membranes are bad.

 

[Buckeye Hydro]

Probably one of two things:
Check valve coming out of the permeate port is stuck shut (Fix: replace it)
DI resin cartridge installed upside down (Fix: flip it end for end and reinstall)

Russ

 

[AEIOU9]

Thanks Buckeye Hydro - I didn't have the DI cartridge installed so that wasn't the issue but I did replace the RO membrane so I guess the permeate port was stuck shut.

Outy thanks for your suggestions too!