Air Button, Presair, Threaded, Black, Nut Not Included part No. 10043B Sold Separately : B460BA

All air push buttons have a sealed internal air bellow to prevent water from entering the air tube that connects the air button to the air switch. Air buttons are commonly used in pool and spa applications located spa side controlling the air switches connected to the spa’s equipment, such as blower, pump, heater, or lights. Other common applications include garbage disposals, indoor/outdoor lighting, or medical and other industrial applications.