Yea, I have both down there, but for some reason, like, the bathroom water doesn't seem as good to me as the kitchen. The kitchen water feels like softer and tasts better, but I think there are more metals or something from the bathroom because I will pour water into a glass and crap settles, but when I pour a glas of water from the kitchen, it's crystal clear. Both the gh and kh are the same, along with ph, etc.
for water you tap into the washer hookups with standard garden hose spliters then a third to bring the hot and cold together.
You can dump it in where ever the washer dumps.