devices for evidence of abnormal flow, which might
reveal loss through leakage.
In galvanized pipe installations, where the fittings
on either side of the leak are not readily available, the
leaking section may be cut out. In this operation, one
person holds the pipe with a wrench to keep it from
turning in the next fitting, and another person cuts a
thread on it while it is in place using a hand type of pipe
threader. The cutout section is then replaced with a
coupling, a pipe section of the required length, and a
You may also have to repair leaks in copper piping.
If a copper pipe leaks, cut out the damaged section and
replace it with a new section, using either soldered or
compression-type joints. When a piece of cast-iron
pipe less than full length is needed for replacement, cut
it from a double-hub pipe, so the remaining piece has a
hub left for use in other work.
If you need a fitting for a short space or if existing
work cannot be removed easily, use short spigot ends
for sleeves. Closely observe figure 5-37. This figure
shows how to install a fitting in a restricted space.
Replace a fitting or insert one into an existing line
by following the four-step procedure shown in figure
5-38. When the job calls for adding connections to an
outside vitrified clay sewer line, here is one step-by-
1. Remove a section of the existing sewer pipe that
is long enough to receive a new Y-fitting.
2. Break half of the hub rim of the new Y-fitting, as
shown in view A, figure 5-39.
Figure 5-37.Installing a fitting in a restricted space.
Figure 5-38.Insert a fitting in an existing line.
3. Insert the spigot end of the Y-fitting into the hub
of the existing pipe. At the same time, place the
remaining half of the hub end of the Y-fitting over the
cut end of the existing pipe with the Y-branch pointing
away from the new inlet. (See the first position of view
B, fig. 5-39.)
4. Rotate the Y-fitting, so the broken half of the
hub is up and the Y-branch is in the correct position to
receive the new inlet connection. (See the final position
of view B, fig. 5-39.)
5. Pour the joint carefully; round over the broken
half of the hub with plenty of concrete or mastic
compound, as shown in view C, figure 5-39.