Description
Xylem-McDonnell & Miller 551-S Make-Up Water Feeder
The Xylem-McDonnell & Miller 551-S is a reliable make-up water feeder engineered for use with steam separators, receivers, and tanks. Designed to automatically replenish water lost through evaporation, blowdown, or system leaks, the 551-S helps maintain proper water levels and protects steam system components from damage caused by low-water conditions. With its robust construction and straightforward installation, this feeder is a trusted solution for commercial and industrial steam heating applications.
Key Features
- Designed for use with steam separators, receivers, and tanks
- Automatically maintains proper water levels in steam systems
- 25 PSI maximum vessel pressure rating
- 1″ NPT inlet and outlet connections for easy integration
- Durable construction for long-lasting, dependable performance
- Helps prevent low-water damage to boilers and steam system equipment
- Part Number: 136400
Specifications
- Model: 551-S
- Part Number: 136400
- Brand: Xylem-McDonnell & Miller
- Maximum Vessel Pressure: 25 PSI
- Connection Size: 1″ NPT
- Application: Steam separators, receivers, and tanks
Application
The 551-S make-up water feeder is ideal for steam heating systems where consistent water supply is critical. It is commonly installed on steam separators, condensate receivers, and storage tanks to ensure automatic water replenishment, reducing manual monitoring and minimizing the risk of costly system downtime.







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