... used in food waste disposer, massage tub ,pumps for swimming pools and spas, hot tubs, sanitary equipment ... swich.it is provided with a snap action switching for higher current capacity, SPDT contact form and ... the air switch has two actions:1) Momentary action: when the air button is pushed, the air ... the basic pressure switches are working.2) Alternate action (also referred to as latching or bistable): ...