The only 2 reasons you need a three way poly valve is that it saves time and keeps it idiot proof as much as possible with two dedicated lines. You cannot take your soap line out of your soap chem tank and put it into your acid chem tank. The soap will completely neutralize all your acid ,making it useless. It takes only an ounce of soap to ruin gallons of acid.
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As long as the folks on here agree with you.
Personally, I’m hesitant to do anything with a high pH of SH and follow it up with an acid…it just sounds bad on paper, but if others have done it then more power to you!
In my glass cleaners I use a bunch of dissolved chelation, such as EDTA, NTA, or sodium Gluconate. This eliminates the minerals in the water from depositing on the window. Then I put in a touch of isopropyl alcohol (rubbing alcohol at super strength) so the water dries quicker, which also eliminates the streaking issues.
Good luck!
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Should be a better fit for your task at hand. It gives more foaming action and dwell time compared to the super sonic acid. @pressureguy likes the m37 as well, to much rinsing for me. But I also don’t go over a biweekly wash. So there a lot cleaner to wash in the beginning compared to what your dealing with. I don’t necessarily need all the dwell time.
I have had success cleaning window with house mix then following up with ds windex and rinse. Would you say that’s the same as you describe
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First off, I hope your mamma is doing better and a speedy recovery.
I agree with you. We always put our low ph acid on first to de magnetize the road film, dirt,soot , etc,etc , followed by a high ph soap to neutralize the acid then clean the above. Then it’s all at a neutral state for the environment.
I think hcs400 is way to aggressive for this job lol.
@Infinity have you sprayed some water on the windows to see if there hydrophilic or phobic. That will make all the difference
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If they sheet well I’d just house wash mix them and rinse.
Phobic I don’t think there is anything you can do with water spotting . Even if you spray di waterit’s still going to leave spots. No way to use a rinse bar or fan jets.
I doubt they expect completely spot free results. I know I don’t. But the DI water should at least help reduce the degree of spotting.
I wish I could afford DI. But I’m going through about 1000 gallons an hr. So us poor folk can afford a water softener only
I was thinking that. But was gonna say dilute it down to 10% …
You could always plumb about ten 4x40 RO membranes in parallel…
But that would break the bank in a different way 
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What’s your tds?
I’m no water expert, so I bought these to test at all my locations I wash and get water at.
See where my pinky nail is around the 425 mark ? It’s usually there. Says over 120 ppm scaling will occur, I’m around the mark were they say a dish washer is useless. It’s all well water @Jordie in the limestone filled state of Arkansas sir
Time to step into the 21st century and get some artwork painted on your nails. Oh, and one of these.
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Lol. That’s fancy Brian. And I’m getting gel nails next in blue, I’m thinking the pink and glitter clashes with my light skin tone and ppl don’t take me seriously @marinegrunt 
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Haha…I don’t have one of those things. I just remember someone on here talking about one. I also don’t have pink and blue sparkly nails. Although, that is my thong color for the week. 
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Two weirds do make a right!
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