For some reason I think it’s always been that way. But I just contributed it to my old house I lived in before as to not having good water pressure. Honestly I am not sure how old the membrane is. I just recently set everything back up in a new home and I put in all new plumbing and a new whole house pressure valve. And the house has good water pressure. I replaced everything. Before I set it up. Well I forgot to order a meme brand. But I didn’t think much about it at first. I was still getting 0 tds coming out. When I first installed the unit I had it on a clamp valve / refrigerator ice maker thing. I took that out and put in an actual valve. And still had the same
Problem. He seems the booster pump.
My goal is to set up a water station and make my own salt ( currently have a 75 gallon display ). As I live about an hour away from any local stores. And was gonna run a line directly to my auto top off.
Have you tried removing the pressure guage and hooking it directly up to your supply line? I'm guessing if you're unsure of the age the membrane could very well be a contributing factor.

