The tap water around here is about 270ppm.
Now I wouldnt want to do this as a rule, but is it possible to rig up a DI cannister and have tap water run through it, therefore at mains pressure; producing 0ppm water.
The reason I ask is Im thinking there may be times when you need to produce an amount of water on the job so to speak but having already used all your RO.
Thanks.
Matt