Resideo by Honeywell TDV040 1/2" NPT Tridicator with 3-1/8" Dial and Shut-Off Valve

The Resideo by Honeywell TDV040 is a professional-grade tridicator gauge designed for hydronic heating systems, combining three essential measurements into one convenient instrument. This versatile device monitors system pressure, temperature, and altitude in a single 3-1/8" easy-to-read dial face.

Key Features:

• 1/2" NPT male threaded connection for standard installation compatibility
• 3-1/8" dial face with clear, color-coded zones for quick system status assessment
• Integrated shut-off valve allows gauge isolation for maintenance or replacement without draining the system
• Simultaneous display of pressure (PSI), temperature (°F), and altitude (feet)
• Durable brass construction with corrosion-resistant components for long service life
• Suitable for boilers, radiant heating systems, and closed-loop hydronic applications

This tridicator simplifies system monitoring by eliminating the need for multiple separate gauges, making it an essential diagnostic tool for HVAC technicians and heating system maintenance. The built-in shut-off valve adds convenience for service work, allowing gauge removal without system shutdown.