Description
The Watts F163720 is a 1-inch bronze float and thermostatic (F&T) steam trap from the proven 40XVL-4 series, engineered for dependable condensate removal in commercial and industrial steam heating systems. With a bronze body construction and ratings of 125 PSI and 210°F, this trap delivers long-lasting performance in demanding hydronic and steam distribution applications.
Product Overview
Float and thermostatic steam traps continuously discharge condensate as it forms while venting air and non-condensable gases at startup and during operation. The 40XVL-4 design features a free-float mechanism that modulates condensate discharge in direct response to load, preventing steam loss and maximizing system efficiency. The fail-safe (FS) designation ensures the trap defaults to an open position upon failure, protecting equipment from damaging condensate backup.
Key Features
- 1″ pipe connection for straightforward installation in standard steam lines
- Bronze (BRZ) body construction for excellent corrosion resistance and durability
- Rated for 125 PSI operating pressure and 210°F operating temperature
- Float and thermostatic (F&T) design for continuous, modulating condensate discharge
- Integrated thermostatic air vent for automatic purging of air and non-condensable gases
- Fail-safe (FS) open-on-failure design protects system components from condensate flooding
- Suitable for steam heating, process, and HVAC hydronic steam distribution systems
Specifications
- SKU: F163720
- Model: 40XVL-4
- Brand: Watts
- Connection Size: 1″
- Body Material: Bronze (BRZ)
- Maximum Operating Pressure: 125 PSI
- Maximum Operating Temperature: 210°F
- Trap Type: Float & Thermostatic (F&T)
- Failure Mode: Fail-Safe Open (FS)
Applications
- Commercial and industrial steam heating systems
- HVAC hydronic steam distribution
- Unit heaters, heat exchangers, and coil drainage
- Process steam condensate return lines






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