Legend Valve
Legend Valve 800-653 1/2" T-Well Temp Gauge 60-280°F accessory
A 2" temperature gauge with 1/2" MNPT, 1" probe and thermowell reading 60 to 280°F
- Accurate temperature monitoring across 60-280°F range
- 1/2" MNPT connection fits standard pipe threads
- Integrated thermowell protects sensor from direct flow
- 1" probe length reaches into fluid stream
- Legend Valve brand trusted in HVAC applications
1/2" T-Well Temperature Gauge
This Legend Valve gauge monitors boiler or radiator water temperature through a 1/2" male NPT thermowell. It is intended for HVAC technicians and facility managers who need local temperature indication on hydronic heating systems.
Installation and common issues
The gauge threads into a 1/2" female NPT fitting on the boiler or piping. A wrench flat on the thermowell allows tightening without stressing the dial case. Cross-threading or over-tightening can damage the brass threads and cause leaks. The probe must sit fully inside the thermowell for accurate readings.
60-280°F operating range
The dial reads from 60 to 280 degrees Fahrenheit, covering typical hydronic heating temperatures. Systems that operate above 280°F or require sub-ambient readings will exceed this gauge's scale. California Proposition 65 warnings apply to this product.
Highlights
- Accurate temperature monitoring across 60-280°F range
- 1/2" MNPT connection fits standard pipe threads
- Integrated thermowell protects sensor from direct flow
- 1" probe length reaches into fluid stream
- Legend Valve brand trusted in HVAC applications
Specifications
| Brand | LEGEND VALVE |
|---|
Questions about this item
How can I verify the Legend Valve 800-653 is reading correctly after installation?
Compare the gauge reading against a known reference thermometer at the same point in the system; the scale covers 60 to 280°F, so the needle should track within the marked range during normal operation.
What components come with the Legend Valve 800-653 and what must be sourced separately?
The package includes the 2" temperature gauge, 1/2" MNPT thermowell and 1" probe; pipe sealant or thread tape for the NPT connection and any required piping fittings are not included.
Should I choose the 60–280°F version or a different range for a hydronic heating loop?
The 60–280°F scale matches typical hydronic supply temperatures; select this version when your design temperatures fall inside that window.
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