Best water PH for washing?

[locarno]

Hello
I have on the garage big tank of rain water. However to prevent green water and alge we add some kind of pilles. They probably change PH of the water but I'm not sure. I want to ask if it is safe to use rain water with this pilles for car washing? The second question is what is the best ph for car cleaning?

[dgage]

If it were pure rain water, it would likely be great but there are many chemicals in the air so you’d really need to get your rain water tested. The simplest test is a ph test using drops, test strips, or electronic testers. Drops turn the water a certain color but only work up to 10 or 11. Electronic testers probably aren’t reliable unless you buy a really ice and expensive one. So I’d recommend looking up ph test strips on the big A site. If you wanted to get a mineral report on your water, you might be able to find someone local or send a sample off to be tested.

Alternatively, you could pump the rain water through a filter and use it that way but you’d probably still want to test the water.

[locarno]

But what PH is good for car? 7-8 will be ok?

[UncleDavy]

Tap water can have ph ratings between 6.5 and 8.5 and that would be considered pH neutral. You want to get as close to 7 as possible for that is the perfect value.

[FUNX650]

I have on the garage big tank of rain
water. However to prevent green water
and alge we add some kind of pilles.
They probably change PH of the water
but I'm not sure.

I want to ask if it is safe to use rain water
with this pilles for car washing?

The second question is what is the
best ph for car cleaning?

•In regards to your first question:
-what exactly are these algae preventing pills
that you are adding to the rain water—is it
something like “SHOCK” (either chlorinated/
non-chlorinated)—that’s added to pools?
-IMO: if the ‘treated/shocked’ rain water’s pH
level is between 7.0‐8.0 —> [use the afore-
mentioned pH test strips] it’s safe enough to
use to wash vehicles.


•As to your second question:

-Car wash solutions: having higher pH
levels (more than 7.0 pH—ie: alkaline)…
in conjunction with surfactants…are best
for cleaning organic materials: insects,
bird poop, road film, oils, greases, etc.;
and, to also neutralize environmental acids
that have accumulated on vehicles’ surfaces.

-Car wash solutions: having lower ph levels
(lower than 7.0 pH—ie: acidic)…in conjunction
with surfactants…are best for cleaning inorganic
and granular materials: sand, soil, clay, salt, etc.

•However:
-Most modernday Car Wash Shampoos have been
formulated to clean the majority of both types of
contaminates…basically taking the guesswork out
of the equation.

-Which, in turn, makes choosing any one of
the Car Wash Shampoos offered by Autogeek
a cinch.

pH…what me worry?!?!


Bob

[57Rambler]

Most likely any "water" which is acidic or basic enough to harm your car's paint will also harm your skin, clothes, etc.