Legend Valve 117-M Hydronic Tube Cap 1-1/8 Inch Od Brass

Product Description

The LEGEND VALVE 117-M is a brass compression tube cap designed to seal 1-1/8 inch OD hydronic tubing in closed-loop heating systems. It provides a secure, pressure-rated closure on open line ends without the need for soldering or brazing. Built from high-strength brass, the 117-M resists corrosion and scale buildup common in high-temperature boiler water. The compression fitting design allows a technician to terminate unused tubing runs quickly and reliably, maintaining system pressure integrity during service, expansion, or staged commissioning of hydronic piping networks.

This tube cap is suited for residential and light commercial hydronic heating applications, including larger-capacity boiler loops, auxiliary flow circuits, and system expansion runs in mechanical rooms. It is installed wherever an open 1-1/8 inch OD copper or compatible tubing end must be capped off temporarily or permanently. Plumbers and hydronic heating technicians working on baseboard, radiant floor, or panel radiator systems will encounter this fitting in standard boiler room piping configurations.

Key Features

• Brass construction resists corrosion and scale in high-temperature hydronic water
• Compression connection eliminates soldering and brazing for faster installation
• Fits 1 inch nominal tubing with 1-1/8 inch OD
• Seals open line ends and protects unused ports in boiler and mechanical room piping
• Maintains pressure integrity in complex hydronic loop configurations

Compatibility

Designed as an OEM-style compression tube cap for 1 inch nominal, 1-1/8 inch OD hydronic tubing used in residential and light commercial boiler and heating loop piping systems.

Installation Notes

Installation should be performed by a licensed plumber or qualified hydronic heating technician. Depressurize and drain the affected circuit before fitting the cap onto an open tubing end. Compression fittings require proper ferrule seating and appropriate tightening with a wrench — do not overtighten. Verify system pressure integrity after installation before returning the boiler loop to service.

Technical Specifications

• Nominal Size: 1 inch
• Outer Diameter (OD): 1-1/8 inches
• Connection Type: Compression
• Material: Brass
• Application: Hydronic heating systems

Standard Information

• Brand: LEGEND VALVE
• Manufacturer Part Number: 117-M