Custom Search
|
|
 
|
||
|
NINETY-DEGREE Y-BRANCHES. Four
types of cast-iron soil pipe 90
Y-branches generally used are shown
in figure 8-14, view C. These are
normally referred to as COMBINATION
Y AND 1/8 BENDS. The STRAIGHT type
of 90 Y-branch is used in sanitary
sewer systems where a branch feeds into a
main, and it is desirable to have the incoming branch
feeding into the main as nearly as possible
in a line parallel to the main flow. The REDUCING
90 Y-branch is the same as the
straight type, except that the branch coming into
the main is a smaller size pipe than the main. The
DOUBLE 90 Y-branch (or DOUBLE
Figure 8-15.-Cross section of vitrified clay or concrete pipe fittings. COMBINATION Y and 1/8 BEND) is easy to recognize since there is a 450 takeoff bending into a 90 takeoff on both sides of the fitting. It is especially useful as an individual vent. The BOX type 90 Y-branch has two takeoffs. It is designed so that each takeoff forms a 90 angle with the main pipe. The two takeoffs are spaced 900 from each other. |
 
|
|
|
||
