Xylem 404337 B1125S-3 3/4" Inverted Bucket Steam Trap with Strainer

The Xylem 404337 B1125S-3 is a high-performance inverted bucket steam trap with integrated strainer designed for efficient condensate drainage in industrial and HVAC steam systems. This trap features a 3/4-inch NPT connection and is rated for maximum allowable working pressure of 125 PSI, making it ideal for a wide range of steam applications including mains drainage, process equipment, and systems requiring condensate removal with lift capability.

How It Works:

The inverted bucket mechanism uses buoyancy to automatically control condensate discharge. When steam enters the trap, it flows under the inverted bucket causing it to rise and close the discharge valve, preventing steam loss. As condensate accumulates and fills the bucket through a vent hole, the bucket loses buoyancy and sinks, opening the valve to discharge condensate. This reliable mechanical operation requires no external power and provides intermittent drainage based on condensate load.

Key Features:

• Integrated strainer protects internal components from debris and particulate matter
• Durable construction suitable for continuous industrial service
• 125 PSI maximum working pressure rating
• 3/4-inch NPT threaded connections for standard piping systems
• Resistant to waterhammer damage due to bucket design
• Simple two-part moving mechanism (bucket and valve lever) for reliable operation
• Suitable for steam mains, laundry equipment, food processing, and general industrial applications

Applications:

This trap is designed for industrial steam systems where steady pressure and reliable condensate removal are required. The included strainer makes it particularly well-suited for applications where dirt and scale may be present in the system. Common applications include steam mains drainage, process heating equipment, laundry and dry cleaning plants, food processing equipment, and systems with lift requirements in discharge lines.