
Resideo TDV040 Tridicator
The Resideo TDV040 Tridicator is a professional-grade boiler pressure and temperature gauge designed for precise monitoring in hydronic heating systems. Featuring a 3 1/8" dial size, this instrument provides clear, simultaneous readings of system pressure and water temperature, essential for verifying boiler performance and safety. The mechanical movement is engineered for reliability in high-heat environments, offering a 60-320 degree temperature range and a 75 psi pressure range. With a standard 1/2" NPT bottom mount connection, the TDV040 ensures a secure, leak-free fit on residential and light commercial boiler headers. This analog tridicator gauge acts as a critical diagnostic tool, allowing technicians to quickly identify issues such as thermal expansion or circulation failures. Its rugged construction and high-visibility face make it a standard replacement part for contractors maintaining closed-loop heating systems requiring accurate HVAC pressure monitoring and hydronic temperature measurement.
Key Benefits:
- Dual-Function Monitoring: Consolidates pressure and temperature readings into a single boiler trim component to save space and reduce leak points.
- High-Temperature Resilience: Sustains accuracy across a wide hydronic heating range of up to 320°F.
- Standardized Compatibility: The 1/2" pipe thread connection fits most standard boiler tapping ports for streamlined field replacement.
- Enhanced Legibility: The 3 1/8" face allows for rapid verification of boiler system pressure from a distance, facilitating easier maintenance rounds.
Common Questions:
What is the standard mounting orientation for the TDV040?
This model features a bottom mount 1/2" NPT connection, typically installed directly into the boiler casting or a dedicated tapping on the supply manifold.
Does this gauge work for high-pressure steam applications?
No, this unit is rated for a maximum of 75 psi and is specifically designed for hot water boilers and hydronic loops rather than high-pressure steam systems.
Can the TDV040 be used to calibrate thermal expansion tanks?
Yes, by providing real-time static pressure readings, it allows technicians to ensure the expansion tank is properly charged and the system is not exceeding its relief valve setting.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $38.13
-65%$38.13
$13.35Resideo TDV040 Tridicator
The Resideo TDV040 Tridicator is a professional-grade boiler pressure and temperature gauge designed for precise monitoring in hydronic heating systems. Featuring a 3 1/8" dial size, this instrument provides clear, simultaneous readings of system pressure and water temperature, essential for verifying boiler performance and safety. The mechanical movement is engineered for reliability in high-heat environments, offering a 60-320 degree temperature range and a 75 psi pressure range. With a standard 1/2" NPT bottom mount connection, the TDV040 ensures a secure, leak-free fit on residential and light commercial boiler headers. This analog tridicator gauge acts as a critical diagnostic tool, allowing technicians to quickly identify issues such as thermal expansion or circulation failures. Its rugged construction and high-visibility face make it a standard replacement part for contractors maintaining closed-loop heating systems requiring accurate HVAC pressure monitoring and hydronic temperature measurement.
Key Benefits:
- Dual-Function Monitoring: Consolidates pressure and temperature readings into a single boiler trim component to save space and reduce leak points.
- High-Temperature Resilience: Sustains accuracy across a wide hydronic heating range of up to 320°F.
- Standardized Compatibility: The 1/2" pipe thread connection fits most standard boiler tapping ports for streamlined field replacement.
- Enhanced Legibility: The 3 1/8" face allows for rapid verification of boiler system pressure from a distance, facilitating easier maintenance rounds.
Common Questions:
What is the standard mounting orientation for the TDV040?
This model features a bottom mount 1/2" NPT connection, typically installed directly into the boiler casting or a dedicated tapping on the supply manifold.
Does this gauge work for high-pressure steam applications?
No, this unit is rated for a maximum of 75 psi and is specifically designed for hot water boilers and hydronic loops rather than high-pressure steam systems.
Can the TDV040 be used to calibrate thermal expansion tanks?
Yes, by providing real-time static pressure readings, it allows technicians to ensure the expansion tank is properly charged and the system is not exceeding its relief valve setting.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Product Information
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Description
The Resideo TDV040 Tridicator is a professional-grade boiler pressure and temperature gauge designed for precise monitoring in hydronic heating systems. Featuring a 3 1/8" dial size, this instrument provides clear, simultaneous readings of system pressure and water temperature, essential for verifying boiler performance and safety. The mechanical movement is engineered for reliability in high-heat environments, offering a 60-320 degree temperature range and a 75 psi pressure range. With a standard 1/2" NPT bottom mount connection, the TDV040 ensures a secure, leak-free fit on residential and light commercial boiler headers. This analog tridicator gauge acts as a critical diagnostic tool, allowing technicians to quickly identify issues such as thermal expansion or circulation failures. Its rugged construction and high-visibility face make it a standard replacement part for contractors maintaining closed-loop heating systems requiring accurate HVAC pressure monitoring and hydronic temperature measurement.
Key Benefits:
- Dual-Function Monitoring: Consolidates pressure and temperature readings into a single boiler trim component to save space and reduce leak points.
- High-Temperature Resilience: Sustains accuracy across a wide hydronic heating range of up to 320°F.
- Standardized Compatibility: The 1/2" pipe thread connection fits most standard boiler tapping ports for streamlined field replacement.
- Enhanced Legibility: The 3 1/8" face allows for rapid verification of boiler system pressure from a distance, facilitating easier maintenance rounds.
Common Questions:
What is the standard mounting orientation for the TDV040?
This model features a bottom mount 1/2" NPT connection, typically installed directly into the boiler casting or a dedicated tapping on the supply manifold.
Does this gauge work for high-pressure steam applications?
No, this unit is rated for a maximum of 75 psi and is specifically designed for hot water boilers and hydronic loops rather than high-pressure steam systems.
Can the TDV040 be used to calibrate thermal expansion tanks?
Yes, by providing real-time static pressure readings, it allows technicians to ensure the expansion tank is properly charged and the system is not exceeding its relief valve setting.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.












