Decrease in RO Unit Output

[josephxsxn]

I have had my RO unit for a while now (this one probably 4+ years), never replaced the membrane only the carbon and sediment filters before it. Because of the low water pressure there is a booster pump and the normal input to the RO Unit is around 80-90 psi. The output TDS of the water seems fine about what I have seen for a while now at the new house around 2-4TDS before the DI. It seems that recently the output speed has gone way down, when I used to be able to make 100+ gallons in a day it's more like 3 days now.

Any ideas what's going on? Is the RO membrane reaching end of life and need replacement?

 

[Dbichler]

Ro membrane or sediment filter clogged likely cause but ro membranes usually good for 2 or less years

 

[ShepherdReefer]

Ro membrane or sediment filter clogged likely cause but ro membranes usually good for 2 or less years

That could be it.

 

[Aqua Man]

My GPD goes down in the winter do to cold water moving slower through the membrane.