PUMP TESTING PROCEDURE

TANK-TO-PUMP FLOW RATE CHECK

If the apparatus is equipped with a water tank, the tank-to-pump flow rate also shall be checked using the following procedure:

        (1)    The water tank shall be filled until it overflows.

        (2)    All intakes to the pump shall be closed.

        (3)    The tank fill line and bypass cooling line shall be closed.

        (4)    Hose lines and nozzles for discharging water at the anticipated flow rate shall be connected to one or

                 more of the discharge outlets.

        (5)    The tank to the pump valve(s) and the discharge valves leading to the hose lines and nozzles shall be

                 fully opened.

        (6)    The engine throttle shall be adjusted until the maximum consistent pressure reading on the discharge

                 pressure gauge is obtained.

        (7)    The discharge valve(s) shall be closed and the water tank refilled. The bypass line shall be permitted

                 to be opened temporarily if needed to keep the water temperature in the pump within acceptable

                 limits.

        (8)    The discharge valves shall be reopened fully and a pitot reading or other flow measurement shall be

                 taken while the water is being discharged. If necessary, the engine throttle shall be adjusted to

                 maintain the discharge pressure noted in (6).

        (9)    The flow rate shall be recorded and compared with the rate designated by the manufacturer when the

                 apparatus was new or with the rate established in previous testing.