It shouldn't cost much to change it to a 1.5" water service pipe. Five baths require a lot of water. The link below has more information on pipe sizing. Terry

: Depending on several factors, it may not be necessary, but it would never be inadvisable to increase the size. hj

: : We're planning to start construction on a fairly large 5 ba house. The contractor has spec'ed a 1" service line. My current house as a 1.5" line. Is this "upgrade" advisable?

: : TIA,

• Water pipe sizing chart