If you are the type who is comfortable with doing his own plumbing work, General Supply carries a complete line of Pex tubing and fittings.  Tuff Pex Tubing is a Cross-linked Polyethylene material often used in both residential and manufactured housing plumbing.   General Supply stocks a complete line of brass fittings that work perfectly with pex tubing.  These fittings attach to the tubing easily with either crimp or oetiker rings.  General Supply recommends oetiker rings for reasons of cost, and ease of use.