When plumbing for a clothes washer that is
installed in a finished wall, the standpipe and
hot and cold water lines can be connected to a
washing machine outlet box, Figure 20-6. The
finished appearance is much more attractive
than having the pipe exposed. Water hammer
arrestors are installed above the washing
machine outlet box. Connecting the water pipes
to a washing machine outlet box is essentially
the same as the process described previously.
The next step is to install pipe A and
continue it to the right and join with the hot
water branch to the kitchen sink. Pipe E goes to
the water heater. An offset is needed to join E
with the continuation of A. Measure, cut, and
test fit these components before making the
joints permanent.
With the hot water pipe in place, the cold
water pipe can be installed using the same
procedure, with one exception. There is no
need for an offset in the cold water pipe
because the horizontal run is below the bottom
of the floor joist. You may want to stop the
cold water pipe installation at the inlet of
the tee to the kitchen sink. From this point, the
pipe needs to connect to the cold water main
and the cold water pipe to the bathrooms.
Once the position of the run to the bathrooms
has been determined, it may be easier to make
the connection to the kitchen/laundry cold
water pipe.
Installing Water Supply
Piping to the Bathrooms
The schematic in Figure 20-7 shows the
water supply pipe for the two bathrooms. The
cold water pipes to the water closets can
branch vertically from the main horizontal run,
provided the pipe is positioned directly below
the wall separating the two bathrooms. If this is
not practical, these pipes need to be offset
before extending vertically.
The hot and cold water pipes to the lavato-
ries and to the tub/shower units require offsets
similar to those for the laundry so that the runs
of pipe can cross one another. The installation
of pipes to one of the tub/shower units
356
Section 3 Plumbing System Design and Installation
Figure 20-6. A washing machine outlet box provides a
neat and attractive means of installing the standpipe
and water supplies into a framed wall.
Valve
Hot
Water
Cold
Water
Standpipe
Figure 20-7. Note that the water pipe from the meter divides into hot and cold water branches at the water heater.
To meter
To kitchen
& laundry rm.
Lav.
Tub/
shower
W.C.
To hose
bibb A
W.C.
Lav.
Tub/
shower
To water
heater
3⁄4″ pipe
(All other pipe &
fittings are 1⁄2″)
Bathroom 1
Bathroom 2