Mighty HD said:
Is it safe to get a water softener if my house has galvanized pipe? The water here is pretty hard and would like to ease it up a bit, especially for the cars.
Also, does it cause the cars to rust prematurely?
I'm not sure if this is directly applicable to your question, but as far as hard water problems when washing/drying cars is concerned here was my situation...
I have well water (pretty hard water) at my house and I was having the same problem you are when I went to dry my car. We have solar salt filtration for all water inside the house, but the outside water sources are almost directly from the well. Thus, I'd always get nasty white spots on the car when they dried, no matter how fast I dried it.
Now the problem with that is, let's say you do get all the water dried off before it turns into that chalky white spot (I tried, it's darn near impossible). You're still leaving hard minerals on the surface of your paint, right before you polish/seal/wax. Not the best situation at all. So basically, I did a LOT of seaching (both here and on the internet) and found something that looked like it would work perfectly.
I wanted an in-line hose filter that I could quickly connect and disconnect from the hose. Well, I found it:
Pure Water Gazette's In-Line Hose Filters (ask for Gene Franks; great guy)
It basically works just like in-home water filtration systems (if you have well water). It can be re-charged (by submerging the filter in a vat of solar salt and pure water for 24 hours) when necessary (they claim after 90 gallons, though mine is still working like a champ after numerous washes).
It works very, very well and I have NEVER seen any white, chalky residue left over after washing and drying since I've been using this filter. I would buy it again in a heartbeat and I really think that it's one of the best investments I've made yet for my detailing. Can't beat the price either ($50) :bounce
I highly suggest this filter. Let me know what you think and I hope this helps!! :xyxthumbs
P.S. Here's a picture of how another Autopia member (n2_space) has it set up: