Vertex Puratek RO Unit Questions

[mike31154]

Your unit is rated for whatever membrane is in it, whether you put in a 50, 75 or 100. But as mr alberta mentioned in his post, when you change membranes to a different rating, you also need to get the appropriate flow restrictor, unless you have one of the newer adjustable flow restrictors which allows you to tweak the flow to match a certain membrane. A system with mismatched membrane & flow restrictor will work but not at its rated efficiency.