After studying this chapter, you will be able to:
• Determine the size of water supply piping.
• Apply the methods of measuring pipe
length between fittings.
• Describe proper procedures for locating
and installing water supply systems using
• Use the prescribed techniques for working
with pipe and fittings made from PVC,
CPVC, PEX, and copper.
The second rough stage of plumbing instal-
lation includes the installation of both DWV
and water supply pipe and fittings that are
eventually covered by finished wall materials.
Because the fall in DWV piping needs to be
maintained, it is typically installed first. Once
the DWV pipe and fittings are installed, water
supply piping can be installed. The finish stage
of plumbing installation is discussed in
Locating fixtures and cutting openings in
the structure are both presented in Chapter 18.
Chapter 19 describes procedures for installing
DWV pipe and fittings. Therefore, this chapter
is limited to the actual installation of water
Overview of Water
Supply Pipe and
The example of water supply pipe and
fitting installation presented in this chapter is
based on the same house plan used in Chapters
18 and 19. The DWV piping is omitted from
most of the drawings to prevent confusion
caused by crossing runs of pipe.
The location of fixtures is known. Before
decisions about the routing of water supply
piping are made, the following questions must
• Where does the water supply enter the
• Where will the water heater be located?