[Greenbuilding] Acidic Water

[Jefro]

I live in the redwoods and have some experience with this.

An ozonating filter can cure some minor pH issues (how?  beats me, but 
the pump guy says so).  However, to really resolve them you need what 
others have called a "neutralizing filter".  This is essentially a tank 
that you fill with mineral salts.  The acidic water passes through the 
salts, which neutralize the pH.  Then you have lots of precipitated 
matter in your water, so you have to filter that out unless you like 
cloudy (but balanced pH) water.  You have to refill it with salts every 
so often.

That said, beware also that getting the acidic water from the well to 
the neutralizer involves pipes as well.  If you use copper, it will 
eventually go away.  Ours was made with thick-wall copper pipe about 30 
years ago.  I replaced a run last year between the well and the 
neutralizer.  It was as thin as foil, which I discovered when it formed 
a pinhole leak that I tried to fix with a gasket and clamp.  (clamp - 
crunch - big squirting noises - profanity from wet amateur plumber)

I replaced that section with PVC, not knowing what else to do with it.  
If we were staying here I'd probably replace it with black iron or even 
galvanized pipe, on the assumption that zinc oxide is non-toxic and iron 
is actually healthy, although those pipes would go away in 30 years as 
well.  Such is the way of nature.