When water pressure drops with use, the switch closes and allows electrical current to flow to the motor.
(the switch; closes; T:When water pressure drops with use) (the switch; allows; electrical current to flow to the motor; T:When water pressure drops with use) Context(the switch allows,List([36, 64))):(electrical current; to flow; to the motor)
the switch allows,List([36, 64))
the switch the switch electrical current
closes allows to flow
T:When water pressure drops with use
electrical current to flow to the motor T:When water pressure drops with use
to the motor