Figure 5-5.Tub-and-shower combination.
Figure 5-6.Wall-hung urinal.
A backflow preventer, such as the type shown in
figure 5-12, should be installed on the discharge side of
a flushometer. A backflow preventer should be
installed on the supply line of a float valve in a water
closet tank if the tank outlet is below the flood level rim
of the closet bowl.
consists of an upper and lower chamber. These
chambers are separated by the diaphragm and relief
valve. The lower chamber is connected directly to the
incoming water supply. This incoming water is the
flushing water and also the water shuts the valve off
after the flushing period. The valve is flushed by the
diaphragm and the water pressure in the upper
chamber. Water is forced into the upper chamber
through a small orifice (hole) in the diaphragm. Water
A detail of a diaphragm type of flushing valve is
shown in figure 5-13. The diaphragm type of valve