2-6. MULTIMEDIA FILTER BACKWASH (CONT)
5 Turn raw water pump engine speed control screw left to reduce engine speed to fast idle. Pressure at PI-1,
on pretreatment assembly, should be about 20 psi (1.4 kPa x 100).
6 Turn valve V-4 to CLOSED position.
7 Check that valve V-5 is closed.
8 Disconnect hose from C-4 and C-5. Connect one end to C-10 and place other end in waste disposal area.