well done marcus you was correct i had the black o rings in the right place spoke to james at xline and he told he that was wrong.
due to leaving my tds meter out in the rain with a huff that is not working now but the flow from the di is super fast now!
just hope the water is pure.
cheers everyyone cheers james at xline!
On the top of the housing where you screw the clear plastic cartridge in there should be a thin black o ring, is that there ?