This affects a lot of things. I had a water pipe off at my house over the weekend. I accidentally installed the pipe backwards when I put it back.
Now the water tastes like Shit! And this ain't supposed to be a sewer line!
It's flat and has lost the sparkle and briskness it had before!
I reversed it back about an hour ago, and now I have Aquatic Nirvana back again. Whew, it was an unpleasant few days...
Next year I'm upgrading the house to 99.99999% OCC Copper, expensive but worth it, I've heard.