Talking to Brett a while ago when we first met,
he had entered wfp by this method, I believe it was an expensive method of doing so,not so much, the set up costs,but the running of it.
Depending on many factors,TDS READING WAS THE CRUTIAL CRITEA, havig access to an outside tap, the best method is a small ro from Ro-man in the long run with the cost of resin,you would recoup the extra cost within months even on small amounts of usage. These were designed for the householder to use occassionally
gaza