yeah i have put the rubber on top of cartridge,you mean not in the cartridge?
on top of outside of cartridge?
thats what i have done,i have tried many differnet ways and now itis tds 16
im scratching my head.
Would it be worth taking the new resin out of the cartridge and putting some more in?
I have the cartridge has a cross on top i pressume that means to go upwards?
cheers for your advice
sorry not sure what you mean,its a small di and is a 300 gpd ro system bought from xline im gonna have a look at di now,didnt see no arrows though.
OK it is the small RO system. Have you got a rubber on the top of the cartridge? If not then it needs one, or the water will be passing through the cartridge without going through the resin.
Peter