Newb here needing some input. I bought my first house one year ago. I have done some upgrades, and now it is time to do the plumbing. My home was built in 48. It has galvanized pipes. I plan to convert to pex and a natural gas water heater hear in the next month. I have a few questions. Should I run two hot water main lines to the house from the utility room, where the WH is? One 1/2" would feed the kitchen sink and DW, the other 1/2" would feed the only bath, or I would run one 1/2" line from the water heater to feed all of these. One other thought is to run 3/4" to the kitchen, and split off to the bath from there, but this would slow the rate at which I receive hot water to the bathroom. Next question is about the stop valves that feed the sink and toilet. The pipes currently run up into the walls from under the house and then elbow out to the stop valves. I would like to replace the galv pipes in the wall as well, so I am thinking of boring up through the floor under the toilet valve and sink to add a new line to a new inline stop valve, thus leaving the galv in the the wall. Thoughts please. I love constructive criticism by the way.