This pressure control device is designed to regulate pressure levels within HVAC systems, specifically those with a maximum pressure of 100 pounds. Measuring at 20 inches in size, it is compact and easy to install in a variety of settings. The Johnson Controls P20CB-6 model is known for its reliability and accuracy, ensuring that pressure levels are maintained within the desired range. This makes it an essential component for HVAC service technicians who need to ensure optimal performance and efficiency from the systems they work on.