Hi guys,
Thanks for your input.
Smudger, the wrappers are definitely off 😀
Tosh, I let the system flush for well over half an hour before running it on Saturday (when I changed everything).
It's a good job I checked the reading coming out of the RO this morning as I only checked final reading from di on Saturday.
Purefreedom have sent some new membranes out to me, as this is the only thing I can think it may be (fault membranes).
If it's no good after the new membranes go in, I may have to order a new ro, as I can't understand how this is happening.
Last time I changed everything the reading was 4 from the ro.