Abstract: A washer pump, which adapted to selectively supply wash fluid to one of front and rear windows of an automobile, comprises a valve mechanism. The valve mechanism has two wash fluid conduction pipes communicating with two wash fluid feed pipes in a pump body, two wash fluid delivery pipes, two valve seats provided on respective ends of two wash fluid conduction pipes and facing each other, and a valve body arranged between two valve seats and capable of closing one wash fluid passage at one valve seat on a low pressure side while opening the other wash fluid passage at the other valve seat on a high pressure side. The valve body has two diaphragms including elastically-deforming portions respectively, whereby the center area of one of two elastically-deforming portions acts as one side seal portion engageable with one valve seat and the center area of the other of two elastically-deforming portions acts as the other side seal portion engageable the other valve seat.

Abstract: A filler cap of a jar for a washer is provided with a stopper portion plugging filler hole of the jar, a pawl portion engaged with the filler hole and a tubular gauge for measuring residual quantity of detergent liquid in the jar which extends toward the bottom of the jar. The tubular guage communicates with an air hole in the cap opening on a finger gripped face of a knob provided on the stopper portion. In using this filler cap, it is possible to measure the residual quantity of the detergent liquid with ease and accuracy since gripping the knob to remove the stopper portion of the cap will also cover the air hole so as to retain a quantity of liquid in the guage indicative of the amount of fluid left in the jar.