Replacement microswitch for FlowZone diaphragm pumps.
The "Waterproof" microswitch option is ONLY intended to replace defective microswitches on Series 2.5 and 3 sprayers.
The "Regular" microswitch option is intended to replace defective microswitches for Series 1, 2, and 2V sprayers. The Regular microswitch MUST be used for Series 1, 2, and 2V sprayers.