The P72DA-1 is a high-quality pressure control switch designed for HVAC systems. It features a double-pole, single-throw configuration and an open-high design that ensures reliable operation even in demanding environments. With a maximum pressure range of 50 to 450 pounds, this switch is capable of handling a wide variety of applications. The switch also includes a manual reset function and a 36-inch capillary tube for easy installation and maintenance. Whether you're working on a commercial or residential HVAC system, the P72DA-1 is an excellent choice for precise pressure control.