Hoffman 401475 Model 508 Water Vent Valve
Hoffman 401475 Model 508 Water Vent Valve
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Apply for Trade Account & Terms →| Performance Parameter | Engineering Baseline Value |
|---|---|
| Manufacturer Part Number (MPN) | 401475 |
| Model Designation | 508 |
Maintaining optimal hydronic system efficiency requires reliable air removal, and the Hoffman 401475 Model 508 water vent valve is engineered to provide exactly that. This automatic air vent prevents air binding and associated noise by continuously purging air from radiators, convectors, and piping circuits to ensure consistent heat distribution throughout your building.
The valve operates using an internal float-activated mechanism that remains closed while water fills the chamber; as air collects, the float drops, opening the precision-engineered needle valve to allow trapped gases to escape. Once the air is purged and water re-enters the valve, the float rises to reseat the needle, creating a watertight seal for worry-free operation.
Key System Performance Baselines:
- Automatic Air Purging: Eliminates system airlocks that cause cold spots in radiators.
- Rugged Construction: Built for high-pressure durability in residential and commercial hydronic loops.
- Noise Reduction: Minimizes gurgling sounds caused by air trapped in hydronic circulators and piping.
- Easy Installation: Standard threading allows for rapid replacement in existing systems.
⚠️ Application Profile: Ideal for hot water heating systems, high-point pipe venting, baseboard radiation, and commercial fan coil units where persistent air accumulation hinders thermal output.
