[David lyddon]

I am usually dI only, coming out the tap at between 35 and 40 ppm.
Today cleaned 3 semis withtapwaterr only, been back to check, no problem at all, does anyone else just use tap water.
regards Dave ppl

[dannymack]

You are so lucky, comes out of my tap around 375

[EandM]

We have well water at about 48 but my mains water is over 300.

[gary999]

since jan 58ppm out of tap have had the odd problem...nothing
I couldn't solve though

[dazmond]

mines comes out of my tap the same 30-40 tds but i always put it through the DI.

the only time i use tap water is when im cleaning plastics.got one to do tomorrow morning.

[pure tech]

I am usually dI only, coming out the tap at between 35 and 40 ppm.
Today cleaned 3 semis withtapwaterr only, been back to check, no problem at all, does anyone else just use tap water.
regards Dave ppl

The minerals that make up the 35-40ppm in your water will likely not damage glass after occasional cleaning but will almost certainly cause damage if windows are cleaned 20 or 30 times per year and left wet.

[Simon Mess]

Each to there own, but there is no way I would use water at 35-40ppm. Given how little resin you would use at that ppm, it just isn't worth the risk of losing customers, or gaining a reputation of not being very good. All that needs is 1 facebooker (or whatever), not happy with your work, but unwilling to bring it up with you directly. When I used to use di only, there has been a couple of times the resin has turned and I have ended up using water that probably wasn't much higher than that, and it was noticed by a customer. They wanted me to cancel, and only through swift action, letter of apology through the door, and offering the next clean for free, did I keep them!.

As I say, each to their own, but in my opinion this could come back and bite you, and for all the money you would be saving on di resin, just isn't worth the risk.