Legend Valve
Legend Valve 800-652 3" Temperature Gauge 1/2" MPT Thermowell accessory
A 3-inch temperature gauge with 1/2" MNPT connection, 1-inch probe and thermowell measuring 60 to 280°F
- 3" dial gives clear temperature reading
- 60 to 280°F range covers common heating systems
- 1/2" MNPT connection fits standard thermowell threads
- 1" probe length suits typical boiler wells
- Includes thermowell accessory for protected installation
Temperature Gauge for Hydronic Systems
This 3-inch temperature gauge includes a 1-inch probe and a 1/2-inch MPT thermowell for direct immersion in hydronic heating circuits. It is intended for installers and facility technicians who need a local temperature reading on boilers, radiators or piping without removing the sensor from the process.
Sustained Load Behaviour
The dial reads from 60 to 280 degrees Fahrenheit, covering the normal operating range of residential and light-commercial hydronic loops. Because the thermowell isolates the probe from flow velocity and pressure spikes, the indication remains stable during continuous circulation and repeated burner cycles.
Selection Decider
The 1/2-inch male pipe thread on the thermowell is the single specification that determines fit; the connection must match an existing tapped port or fitting on the boiler or piping. Verify thread size and probe insertion depth before ordering, as no other mounting hardware is included.
Highlights
- 3" dial gives clear temperature reading
- 60 to 280°F range covers common heating systems
- 1/2" MNPT connection fits standard thermowell threads
- 1" probe length suits typical boiler wells
- Includes thermowell accessory for protected installation
Specifications
| Brand | LEGEND VALVE |
|---|
Questions about this item
How much heat does the 3" temperature gauge generate when it runs continuously?
The gauge is a passive instrument and produces no heat of its own.
What existing fitting must I have to install the 1/2" MPT thermowell?
You need a female 1/2" NPT port on your boiler or radiator to accept the male thread.
Will the 60 to 280°F range cover the older boiler I plan to keep?
Yes, most legacy hydronic boilers operate well within the 60 to 280°F span.
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