Replacement microswitch for FlowZone diaphragm pumps.
The "Waterproof" microswitch option is ONLY intended to replace defective microswitches on Series 2.5 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.