Air-Release Valves for Water and Coolant
and Female
Outlet
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.
For technical drawings and 3-D models, click on a part number.
Inlet | Outlet | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Location | Pipe Size | Location | Relief Port Location | Max. Pressure, psi | Temperature Range, °F | Overall Ht. | Each | |
Brass Body—Vertical Mount | |||||||||
| 1/8 | Bottom | 1/8 | Side | Top | 75 | 33° to 240° | 4 3/8" | 000000 | 000000 |
Inlet | ||||||||
|---|---|---|---|---|---|---|---|---|
| Female Pipe Size | Male Pipe Size | Location | Relief Port Location | Max. Pressure, psi | Temperature Range, °F | Overall Ht. | Each | |
Brass Body—Vertical Mount | ||||||||
| 1/2 | 3/4 | Bottom | Top | 150 | 33° to 240° | 4 3/4" | 000000 | 000000 |
Inlet | |||||||
|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Relief Port Location | Max. Pressure, psi | Temperature Range, °F | Overall Ht. | Each | |
Brass Body—Vertical Mount | |||||||
| 1/8 | Bottom | Top | 50 | 33° to 240° | 2 5/8" | 0000000 | 000000 |
| 1/8 | Bottom | Top | 50 | 33° to 240° | 3 3/4" | 0000000 | 00000 |
| 1/8 | Bottom | Top | 75 | 33° to 240° | 4 3/8" | 000000 | 00000 |
| 1/4 | Bottom | Top | 50 | 33° to 240° | 4" | 0000000 | 00000 |
| 1/4 | Bottom | Top | 150 | 33° to 240° | 4 3/4" | 000000 | 00000 |
| 1/2 | Bottom | Top | 150 | 33° to 240° | 3 3/8" | 0000000 | 00000 |
| 3/4 | Bottom | Top | 150 | 33° to 240° | 3 3/8" | 0000000 | 00000 |
| 1 | Bottom | Top | 150 | 33° to 240° | 3 1/2" | 0000000 | 00000 |
Corrosion-Resistant Air-Release Valves for Water and Coolant
- Max. Pressure: 90 psi
- Temperature Range: See table
These valves are made of corrosion-resistant materials for use in wet conditions and harsh environments. They eliminate air pockets to maintain consistent flow and prevent water surges that can damage equipment. All have a vented relief port to exhaust discharge directly.
Valve with a Buna-N seal is for use in heating and cooling systems.
Valve with an EPDM seal is for use in cooling systems only.
Remote-Discharge Air-Release Valves for Water
- Max. Pressure: See table
- Temperature Range: 32° to 150° F
Unlike valves that release discharge directly, these have a threaded relief port to direct discharge away from your work environment. Often used to increase pump efficiency, they eliminate air pockets in your system to maintain consistent flow and prevent water surges that can damage equipment.
For technical drawings and 3-D models, click on a part number.
Inlet | Relief Port | ||||||
|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Pipe Size | Location | Max. Pressure, psi | Overall Ht. | Each | |
NPT Female Inlet and Relief Port | |||||||
Cast Iron Body | |||||||
| 3/8 | Bottom | 3/8 | Top | 150 | 5 3/4" | 00000000 | 0000000 |
| 1/2 | Bottom | 3/8 | Top | 150 | 5 3/4" | 00000000 | 000000 |
| 3/4 | Bottom | 3/8 | Top | 150 | 5 3/4" | 00000000 | 000000 |
| 1 | Bottom | 3/8 | Top | 150 | 5 3/4" | 00000000 | 000000 |
Ductile Iron Body | |||||||
| 1/2 | Bottom | 1/2 | Top | 300 | 5 1/2" | 00000000 | 000000 |
| 3/4 | Bottom | 1/2 | Top | 300 | 5 1/2" | 00000000 | 000000 |
| 1 | Bottom | 1/2 | Top | 150 | 9" | 00000000 | 000000 |
| 1 | Bottom | 1/2 | Top | 300 | 5 1/2" | 00000000 | 000000 |
| 2 | Bottom | 1/2 | Top | 150 | 9" | 00000000 | 000000 |
| 2 | Bottom | 1/2 | Top | 150 | 10 1/2" | 00000000 | 000000 |
Corrosion-Resistant Remote-Discharge Air-Release Valves for Water
For excellent corrosion resistance in wet conditions and harsh environments, these valves have no metal parts. They eliminate air pockets to maintain consistent flow and prevent water surges that can damage equipment. All have a threaded relief port that can be attached to a drain line for remote discharge.
Inlet | Relief Port | |||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Pipe Size | Location | Max. Pressure, psi | Temperature Range, °F | Overall Ht. | Each | |
NPT Female Inlet and Relief Port | ||||||||
PVC Body | ||||||||
| 1/2 | Bottom | 1/2 | Top | 150 | 32° to 140° | 3" | 00000000 | 000000 |
| 3/4 | Bottom | 3/4 | Top | 150 | 32° to 140° | 3 1/2" | 00000000 | 00000 |
| 1 | Bottom | 1 | Top | 150 | 32° to 140° | 3 7/8" | 00000000 | 00000 |
| 1 1/4 | Bottom | 1 1/4 | Top | 150 | 32° to 140° | 4 1/2" | 00000000 | 00000 |
| 2 | Bottom | 2 | Top | 150 | 32° to 140° | 5 3/4" | 00000000 | 000000 |
Inline Air-Release Valves for Water
- Max. Pressure: 125 psi
- Temperature Range: 40° to 240° F
Eliminate air pockets without stopping flow—these valves have an internal wire brush that traps air bubbles and discharges them through the top relief port while allowing inline flow from the inlet to the outlet. They are often used to increase efficiency in heating and cooling systems. The vented relief port exhausts discharge directly. Valves have a durable bronze body for a long service life.
Key-Operated Air-Release Valves for Water
- Max. Pressure: 150 psi
- Temperature Range: 33° to 200° F
Turn the key to manually release air from radiators, heaters, and other hot water equipment. These valves have a vented relief port that exhausts discharge directly. Body is nickel-plated brass for good corrosion resistance.
Air-Release Valves for Oil and Fuel
- Max. Pressure: 400 psi
- Temperature Range: -20° to 500° F
Use this valve to eliminate air pockets in systems for oil, diesel fuel, gasoline, and kerosene. Valve has a vented relief port to exhaust discharge directly. Body is 304 stainless steel for excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Inlet | Relief Port | |||||
|---|---|---|---|---|---|---|
| Pipe Size | Location | Pipe Size | Location | Overall Ht. | Each | |
NPT Female Inlet and Relief Port | ||||||
304 Stainless Steel Body | ||||||
| 3/4 | Bottom | 1/2 | Top | 7" | 0000000 | 0000000 |
Air-Release Valves for Steam
Our only air-release valves for steam, these seal shut when steam enters the valve to prevent system contents from escaping through the relief port. They are commonly used to eliminate air pockets in steam mains and risers. They exhaust discharge directly through the vented relief port.
For technical drawings and 3-D models, click on a part number.
Inlet | |||||||
|---|---|---|---|---|---|---|---|
| Max. Steam Pressure, psi | Pipe Size | Location | Relief Port Location | Temperature Range, °F | Overall Ht. | Each | |
NPT Male Inlet and Relief Vent | |||||||
Brass Body | |||||||
| 15 | 3/4 | Bottom | Top | --° to 250° | 3 1/2" | 0000000 | 000000 |
Air-Release Valves for Drinking Water
- Max. Pressure: 300 psi
- Temperature Range: 33° to 225° F
Eliminate air pockets in your drinking water system with these valves. They meet NSF/ANSI 61, which designates them as safe to use with drinking water. They have a vented relief port to exhaust discharge directly.
For technical drawings and 3-D models, click on a part number.
Air Admittance Valves
- Valve Type: Air Admittance
- For Use With: Air
- Temperature Range: -40° to 150° F
- Specifications Met: ASTM D2661, ASTM D2665
- Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
No need to vent your plumbing to the outdoors—these valves allow air into your drain, waste, and vent system. When wastewater drains, it creates negative pressure, which opens these valves. When water isn’t draining, they close to prevent sewer gas from escaping. To install, cement the plastic body to your vent pipe. They come as two pieces that thread together. Unthread the pieces to access your vent pipe or for cleaning.
For technical drawings and 3-D models, click on a part number.