Pentair Clear Manual Air Relief Assembly

The Pentair Clear Manual Air Relief Assembly is a critical safety and maintenance component designed for pool and spa filtration systems, specifically compatible with various Pentair cartridge and D.E. (diatomaceous earth) filters. Molded from high-strength, weather-resistant plastic, this clear body assembly allows pool owners and service technicians to visually verify water flow and quickly inspect for trapped air or debris within the relief valve. Functioning as a manual bleed-off valve, it safely releases built-up air pressure inside the filter tank during system startup to prevent dangerous pressure surges. This lightweight yet durable component has a total shipping and operational weight of approximately 0.35 pounds (about 5.6 ounces), making it an easy-to-handle replacement part that threads securely onto the top of the filter tank dome.