can we use flexible plastic pipes for water lines (hot and cold) inside a house (kitchen)?
and the second question concerns water flow.
the way the water pipes are right now in my house, one main (3/4 inch or so thick) water line comes in the house. this splits in several places to go to the water heater (for running water, the hot water boiler (for heating the house) and cold drinking water.
from the water heater I have one pipe coming out and splitting in the garage. on one side it goes in a water column for the bathrooms (on 2 levels) and on the other side it splits in a column for the kitchens. all these pipes are usually 1/2 inch thick. the only one that's larger is the main entrace one.
now, for some reasons, I want to change the lines that go to the upstairs kitchen. since all pipes eventually come in the same (1/2 inch) pipe at the water heater, does it make a difference if I split the bathroom pipes upstairs and take a new branch to the kitchen, or run a new pipe all the way down to the basement to add another split close to the water heater? I'm thinking in terms of water debit, if someone uses the bathroom and kitchen at the same time.
this would mean that two bathrooms and one kitchen areo n the same water pipe, but eventually all pipes come in the same place anyway, so woul the debit drop or stay the same regardless of where the pipes are split?