Description
The Xylem-McDonnell & Miller FS5-1 (Part Number 114780) is a general purpose in-line flow switch designed for reliable liquid flow detection in hydronic heating, cooling, and water systems. Featuring a 1″ NPT connection and a snap-acting SPDT (Single-Pole Double-Throw) switch mechanism, the FS5-1 provides dependable on/off signaling to protect pumps, boilers, and other hydronic equipment from low-flow or no-flow conditions.
Built to the exacting standards that McDonnell & Miller — a trusted Xylem brand — is known for, this flow switch is a go-to solution for HVAC contractors and mechanical engineers who need a straightforward, field-proven flow detection device.
Key Features
- 1″ NPT in-line pipe connection for easy installation into existing piping
- Snap-acting SPDT switch for precise, reliable switching action
- General purpose design suitable for a wide range of hydronic and water system applications
- Protects boilers, chillers, and pumps from damage caused by low or no-flow conditions
- Durable construction from a trusted Xylem brand with decades of hydronic control expertise
- Part Number: 114780
Typical Applications
- Hydronic heating and cooling systems
- Boiler and chiller flow protection
- Pump interlock and flow proving circuits
- Commercial and light industrial water systems
Product Specifications
- Brand: Xylem-McDonnell & Miller
- Model: FS5-1
- Part Number: 114780
- Connection Size: 1″ NPT
- Switch Type: Snap-Acting SPDT
- Installation: In-Line
