These valves are often used to remove air pockets in cooling and heating systems to maintain consistent flow and prevent water surges that can damage equipment. All have a vented relief port to exhaust discharge directly.

Valves with female/male inlets have an inlet with both male and female threads, so they can be connected to both male and female adapters and equipment ports.

Horizontally mounted valves with a female inlet are used in pass-through systems where you need your water or coolant to move through the valve. They’re commonly used for overhead hot or chilled water heating mains.

For technical drawings and 3-D models, click on a part number.