Legend Valve
Legend Valve 800-692 2-1/2 T&P 1/4 MPT Rear Mount accessory
Temperature and pressure gauge with 60 to 280 degree Fahrenheit range, quarter-inch male NPT rear mount
- Temperature & pressure monitoring in one gauge
- 60–280 °F range covers typical hydronic systems
- 1/4″ MNPT rear-mount threads simplify panel installation
- Legend Valve brand trusted in HVAC applications
- California Prop 65 warning disclosed for compliance
Temperature & Pressure Gauge
The Legend Valve 800-692 is a 2-1/2 inch dial gauge designed for hydronic heating systems. It displays both temperature and pressure on a single rear-mount instrument. Installers use it on boilers and radiators where simultaneous monitoring is required. The 1/4 inch male NPT connection threads directly into standard tappings.
Operating Range & Mounting
The gauge reads from 60 to 280 degrees Fahrenheit, covering normal boiler operating temperatures. Rear mounting positions the dial flush against a panel or jacket for clean visibility. No external power is needed because the movement is purely mechanical. The brass internals withstand typical system pressures without leaking.
California Proposition 65 Notice
This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. The warning applies to the gauge materials themselves and does not change installation practice. Installers should follow standard safety procedures when handling and disposing of the unit. No additional accessories or software are bundled with the gauge.
Highlights
- Temperature & pressure monitoring in one gauge
- 60–280 °F range covers typical hydronic systems
- 1/4″ MNPT rear-mount threads simplify panel installation
- Legend Valve brand trusted in HVAC applications
- California Prop 65 warning disclosed for compliance
Specifications
| Brand | LEGEND VALVE |
|---|
Questions about this item
How is the 1/4" MNPT rear-mount fitting sealed during installation?
Wrap the male NPT threads with PTFE tape or pipe dope, thread into the boiler tapping, and tighten with a wrench on the brass hex — the step often missed is checking that the dial face sits upright after final torque.
What part will need replacement first on the 800-692 gauge?
The internal bourdon tube and pointer mechanism fatigue over time; plan to replace the entire gauge assembly when the needle sticks or reads off zero.
At what temperature does the 60-280 °F range stop protecting the system?
The dial tops out at 280 °F, so any sustained boiler temperature above that point exceeds the gauge's readable limit and risks unmonitored over-pressure.
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