they are called "water remediation systems"
they can be very expensive or some what cheap.
all depends on what kind of water system ur on (well, public) , how old ur main line is, how deep it is, whether its hooked to a water meter (if u pay per gallon, or a flat rate monthly) and of course whether or not the city will allow u to hook one up (if u choose to get permits)
if ur on a private well, and uknow where u main line is, u could probably do it urself.
but yea no matter will cost a pretty penny.
there is an alternative tho, it requires some work.
but when i was young my dad hooked up carbon filters to the water lines coming from the water heater. all the water to the inside of ur house will come thru your water heater one way or another.
if u go look, ur water heater should have 2 pipes coming from it, one hot one cold obviously. u get a "constant run" reverse osmosis filter system, or triple stage carbon filter system or something of the sort ($200-$500)
turn off ur main water line outside. go to the pipes coming from your water heater. cut a section out of them so that the filter system can fit there, then buy your connections. weld, glue and go.
litte bit of work but much cheaper than puting a remediation system on ur main line.
heres a single stage carbon filter that can screw right onto to faucet heads.
http://www.homedepot.com/webapp/wcs...Id=10053&productId=100094459&N=10000003+90401
the water that goes to ur house will almost always pass by your clothes washer first.
so you could get a T faucets for the hot and cold line. have the first faucet on the hot line go to ur washer, then have the second faucet on the hot line going to the filter.
same thing on ur cold line. first fauct goes to the washer, the second faucet to your second carbon filter.
then you have both your hot and cold water being filtered.
