RO/DI Units: Preston's of Moore St, Howick, Auckland
Presumably you've talked to people like:
http://www.purewater.co.nz/index.htm
and
http://www.wellingtonwaterfilters.co.nz
well i should have done that i think. got the air con man around today will do the hold house for 7k goes up in the loft vents in everyroom, so got to get the misses back to work again