Patent ID: 6935361

Claim:
A piping system for transporting hot water from a source of hot water, said system comprising: a flow control valve in fluid communication with said source of hot water; a circulator in fluid communication with said flow control valve; a tempering valve in fluid communication with said flow control valve, and said circulator; at least one section of cross-linked polyethylene pipe attached to, and in fluid communication with, at least one of the source of hot water, said flow control valve, said circulator, and said tempering valve; and at least two barbed fittings, said barbed fittings each having a barbed end inserted within an opening in an end of said at least one section of cross-linked polyethylene pipe; wherein said at least one section of cross-linked polyethylene pipe has a wall of a thickness sufficient to allow said section to remain substantially rigid when heated to a temperature of said hot water and to allow said opening at each of two ends of said section of cross-linked polyethylene pipe to be expanded to accept one of said at least two barbed fittings.