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FORTY-FIVE-DEGREE Y-BRANCHES. The two types of 45 Y-branches (fig.
8-14, view D) are the reducing and
straight types. They are
used to
join two sanitary sewer branches at a 45 angle.
The REDUCING type is a straight section of
pipe with a 45 takeoff of a smaller size branching
off one side. The STRAIGHT type of 45
Y-branch, or true Y, is the same as the reducing type
except that both bells are the same size. Figure
8-15 shows some common fittings used with
vitrified clay and concrete pipes. It should be
noted that these types of pipes are used outside
the building, which greatly reduces the number
of different types of fittings. Joints on vitrified
clay and concrete pipe are made of cement
or bituminous compounds. Cement joints might
be made of grouta mixture of cement, sand,
and water. Plastic pipe fittings for waste drainage are shown in figure 8-16.
Figure 8-16.-Typical plastic pipe fittings.
Figure 8-17.-Various joints currently used to connect CISP and fittings. |
 
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