The SPDT Vacuum Switch is a reliable and efficient component for HVAC systems. It is designed to regulate the vacuum pressure within the system, ensuring optimal performance and preventing damage. With its single pole double throw configuration, this switch can be used to control multiple functions within the system. The switch has a range of .1-.5#, making it suitable for a variety of applications. Its compact size and easy installation make it an ideal choice for HVAC service technicians looking for a dependable vacuum switch.