The run (bell end) of this aforementioned reversed
Y-branch will be extended with pipe to within the manhole and there
terminate. When dropped manholes of greater drop depth than three
feet are used, there shall be a one-eighth bend used after two, and
one-fourth bend sweep used instead of four. In all cases, all piping
herein described shall be encased in poured concrete six inches outside
of pipe and fittings, and the mass supported with an adequate footing.
(See Drawing Sheet S#1, Standard Construction Details, Sanitary and
Stormwater Sewers Department of Public Works, White Plains, New York.)