Tap water will clog up your iron and stop it steaming. This applies to kettles and coffee machines and also fish tanks. I also drink it with orange squash as it better tasting and the tea is better aswell.
Are you drinking the water from before or after the resin. The reason I ask is that some time back I recall a post from a member of one of the forums who became ill after drinking water while out on his round.
The water had been through his resin beds.
Although we get a zero reading after the resin I do worry that the resin might cause the water to be unfit for human consumption.
However, providing filters have been changed regularly etc, i would have thought it safe to drinker after the R.O. unit and before the resin. This would be similar or perhaps even the same as water produced by a domestic water filtration unit.
Any update on this?