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Blue isolation valve with thermometer and blue handle

Legend Valve

Legend Valve 833-855B Isolation Valve with Thermometer, Blue

SKU CH-05X9-6SEDF

A 1-inch FNPT x NST isolation valve with built-in thermometer and blue handle

  • Built-in thermometer simplifies temperature monitoring
  • Isolation valve enables quick flow shutoff
  • Blue handle provides clear visual identification
  • 1 in FNPT x NST connection fits standard piping
  • California Proposition 65 chemical warning applies

Isolation Valve with Thermometer

The Legend Valve 833-855B is an isolation valve fitted with a thermometer and a blue handle. It suits plumbing professionals who need flow control and temperature monitoring in one unit. The valve connects via 1 in FNPT x NST threads. This product is new.

Installation and Common Issues

Thread the valve onto the matching FNPT and NST connections using appropriate sealant for a leak-free joint. Ensure the blue handle operates through its full range before pressurising the system. The integrated thermometer requires no wiring. A frequent issue is cross-threading the NST connection if the male fitting is forced.

California Proposition 65 Compliance

This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm under Proposition 65. Buyers who must avoid listed substances should select an alternative component. The warning applies to the valve as supplied.

How it compares

Measured against everything we stock in Drain Cleaners & Plumbing Tools, at today’s prices. Recalculated every night.

Price $72.99
Pricier than about 55% of the 1,087 comparable items (median $57.99).

Specifications

Product
Brand nameLEGEND VALVE

Questions about this item

How can I confirm the isolation valve is operating correctly after installation?

Verify that the blue handle moves smoothly between open and closed positions and that the integrated thermometer displays a stable temperature reading matching the system conditions.

What components are included with the 833-855B valve and what must be purchased separately?

The package contains the isolation valve with thermometer and blue handle; piping, thread sealant and any required NST adapters are not included.

Which version of the Legend Valve isolation valve should I select for a 1 in FNPT x NST connection?

Choose the 833-855B model, which is specified for 1 in FNPT x NST with a blue handle and built-in thermometer.

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