storing membranes in preservative solution

[Sugar Bear]

I store my ro membranes in a preservative solution I mix up.

Is it OK to use distilled water for my preservative solution rather than my permeate?

[DrTimPerkins]

Yes, distilled water if fine.

[Sugar Bear]

AA Thanks

Not sure why I am not just buying 4 new 150 GPD membranes at $5.50 each but the ones I have worked the same on this year as they did on year 1 two years ago.

[DrTimPerkins]

As long as they are still benchmarking well, are well cleaned and rinsed after the final use, and stored properly, there is no reason to replace them.

[82cabby]

I store my ro membranes in a preservative solution I mix up.

Is it OK to use distilled water for my preservative solution rather than my permeate?

If you don’t mind me asking, what preservative solution do you use? Previously I have wrapped mine and stored them in the fridge but moving to 5 400gpd has ruled that out.

[DRoseum]

https://leaderevaporator.com/membrane-preservative/?gclid=Cj0KCQjw8e-gBhD0ARIsAJiDsaW6L9XlRXLIkjzaQaLuDKwZC5V9vfoPUIs4-OENwQVveDpQijexMN4aAlNfEALw_wcB

[Sugar Bear]

If you don’t mind me asking, what preservative solution do you use? Previously I have wrapped mine and stored them in the fridge but moving to 5 400gpd has ruled that out.

I use Metabisulfite Sodium. I think I bought it at CDL about 10 miles north of Rutland on route 7 two years ago. If you want I can send you some in the mail. The small pail I bought is more then I will ever use in 6 lifetimes of sugaring. I could send it out Saturday from here in the Mid-Hudson Valley at Fishkill NY. It's the Mattituck Madness Method of storing. Worked well for him and seems to work well for me. Solution still seems clear with no buggering in it when I open it up each year at the start of a new season.

I do a warm soap wash and I then do a good warm water recirc followed by a long cold-water rinse at the start of each season when storing this way.

[eustis22]

Can you store membranes in the preservative inside a membrane housing?

[82cabby]

I use Metabisulfite Sodium. I think I bought it at CDL about 10 miles north of Rutland on route 7 two years ago. If you want I can send you some in the mail. The small pail I bought is more then I will ever use in 6 lifetimes of sugaring. I could send it out Saturday from here in the Mid-Hudson Valley at Fishkill NY. It's the Mattituck Madness Method of storing. Worked well for him and seems to work well for me. Solution still seems clear with no buggering in it when I open it up each year at the start of a new season.

I do a warm soap wash and I then do a good warm water recirc followed by a long cold-water rinse at the start of each season when storing this way.

Thanks very kindly for the offer! I think I’m going to order a container so I have a long term supply. Do you guys just put them in a 5 gallon food safebucket with a tight fitting lid or go the pvc pipe container route?

[Sugar Bear]

Thanks very kindly for the offer! I think I’m going to order a container so I have a long term supply. Do you guys just put them in a 5 gallon food safebucket with a tight fitting lid or go the pvc pipe container route?

I store in a PVC tube long and wide enough for all four membranes. I use the potable water approved PVC as well. Some people store their membranes with the solution in the housings themselves, but I am not fond of that method for a couple of reasons.

[Sugar Bear]

Can you store membranes in the preservative inside a membrane housing?

I have heard of people doing that on this thread. But I don't mind going the separate PVC canister route. For all I know the membrane housing is more porous than the membranes.

[82cabby]

The preservative container (Leader) says 10 gallons of permeate and one teaspoon of preservative per 8 foot membrane. Anyone know how to translate that to storing small 150 and 400 gpd membranes in pvc pipe? I’m guessing mix a 5 gallon batch with 1/2 a teaspoon?

[carls47807]

AA Thanks

Not sure why I am not just buying 4 new 150 GPD membranes at $5.50 each but the ones I have worked the same on this year as they did on year 1 two years ago.

Where are you getting those for $5.50 each, that's cheaper than they can be manufactured!

[paulslund]

Where are you getting those for $5.50 each, that's cheaper than they can be manufactured!

I would also like to know. I bought 2 400 gpd membranes from AliExpress for around 30each (Cdn$) but they did not perform anywhere near what I was expecting and only got about 20% of the water removal from what I calculated.

[Sugar Bear]

I would also like to know. I bought 2 400 gpd membranes from AliExpress for around 30each (Cdn$) but they did not perform anywhere near what I was expecting and only got about 20% of the water removal from what I calculated.

I was wrong the price was about $25 and $28 with cannister. For the 150 gpd. That was from a seller on EBAY and the GUI was a bit misleading.