Ive lived in this house for 10 years and I've never had REAL soft water. I could always tell a difference if I ran out of salt it would get harder as time went by, but it was never as soft as my last house's water. Today I just happened to notice the house's main line T's off to a filter and then to the softener, which then heads straight into the hot water heater. The other section of the "T" goes to my kitchen sink and outdoor faucet. Is this common? I've uncovered a few things in a search but nothing concrete (like my water) 