4-400 gpd ro

[wlatrout]

Been getting for the season for the last couple of week. I did a Compleat ro wash in ' 22, put the membranes in solution and stored them in a freeze. safe place and brought them out to do a start up wash . I have a aquatec 8800 pump with 4 - 400 gpd membranes. one is new this year . trying to run a wash with needle valve open with the permate and consentrate sin the same bucket. ssap is not going from the first membrane into the 2 nd. membrane but sap is coming out of the permeate line no sap from t he concentrate line . When I turn the permate valve off the pressure doesn't go up. Any ideas would be greatly appreciated. I'm stumped, going to start boiling raw sap tomorrow till I get this figured out. Thanks in advance for any help you can give me.

[DRoseum]

Check o-rings on bottom of membranes. Are they loose? Fully seated in bottom hole of housing?

[wlatrout]

A buddy came over today and we started trying different things and it came down to a couple of pushing fittings that were not completely seated. It seems to be working OK. Thanks D Roseum for answering my post.

[wlatrout]

Guess I spoke to soon. After doing a rinse I set it up to run sap. and now I have permeate going to the concentrate tank and 2 % to the permeate tank.

[DRoseum]

Sounds like you might have the outlet ports switched on one of your housings, or the o-rings are bad at the bottom of one of your membranes. First run this year for me and I had to replace a couple rings. Was pushing sap right past them and into permeate outlet.

[wlatrout]

Thanks, that sounds like a possibility. Going to check that out this morning.

[wlatrout]

Is it possible the membranes are bad since they were stored 2 yrs?

[DRoseum]

When you say "stored them in a freeze" what do you mean? Did you let them freeze? If so, they might be shot.

[wlatrout]

I'M sorry stored them where they wouldn't freeze. My problem now is the concentrate is coming out the where the permeate should be coming out. I have consentrate , left outlet, permeate rt. outlet. Have to close down the permeate line to raise pressure. Not right I know