Just wanted some general guidance/info. My home currently has the old galvanized pipes. This is a problem because the water pressure in the house is weak, and much weaker when two faucets turn kn at the same time. Even if the toilet water is refilling after flushing, have to wait till its done before turning on shower cuz the shower barely pours a drip. A private contractor came out and indicated its the old piping. I have heard that pex ismuch easier to install and arguably a better choice than copper. My home is on raised foundation and have crawling space and can reach my pipes. My question: what kind of pex would be the best option? What size pex should i use. I think the existing pipes are the stamdard 1" or 3/4"..i know the home was built in 40's. Gone try to do this on my own just want to be as prepared and informed as possible..btw, the water pressure outside the house is fine. Thanks for any tips, advice, sugestions.