Replacement membrane

[MapleCamp]

I need a 4 by 40 replacement membrane, none of the ones that I look at say for sap use, mostly brackish or salt water listed in 2-300 dollar range. Will these work as well? or is there certain ppm # or something to look for. thanks

[amasonry]

did you try mes in southern NH? they are the best. I think 1-4x40 membrane was 225.00 last time I was there

[darkmachine]

Last season I used two membranes from amazon, they seemed to work just fine. My ro was a new build so paying $$$ for commercial maple membranes seemed to be a risk if the whole thing ate it's self. I don't have any electronic testing but none of my permeate every tested over 0 on my hydrometer readings,

https://www.amazon.com/gp/product/B07V1PR65P/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1