General-purpose thermo rubber hose assembly with 1/2" 45° female flare swivel fittings on both ends. 240" (20 ft) length for long propane supply runs. 350 PSI max rating. UL569 certified for LP and natural gas. Flexible in cold temperatures, resists kinking.
MB Sturgis Inc. has supplied OEMs, distributors, gas installers, and end users with safe, reliable gas connection products since 1959. The 100251-240 is a 1/2" ID thermo rubber hose assembly built as a true general-purpose connection — suitable for any high-pressure propane or natural gas application where a 1/2" female flare connection is needed on both ends, and where a longer run is required.
At 240" (20 feet), this is the longest standard length in the 100251 hose family — purpose-built for installations where the gas source and the appliance or distribution point are spaced farther apart, such as larger RV underbelly routing, exterior propane supply runs, or generator and standby appliance connections set back from the tank. Each end features a 1/2" 45° female flare swivel fitting, allowing for easy connection to a mating 1/2" male flare fitting without twisting or stressing the hose during installation. The thermo rubber construction stays flexible in cold temperatures and resists kinking, even over long, multi-bend routing paths.
45° female flare swivel fittings on both ends allow easy connection to mating male flare fittings without hose twisting
The longest standard length in the 100251 family — ideal for longer propane supply runs and extended routing distances
Thermo rubber construction stays flexible in cold temperatures and resists kinking through tight, multi-bend routing
Rated for high-pressure propane and natural gas applications up to 350 PSI maximum pressure, UL569 certified
Before ordering, confirm the following: 1. Fitting type at both ends: This hose has 1/2" female flare swivel fittings on both ends. Confirm your connection points use mating 1/2" male flare fittings — this hose is not designed for POL, NPT, or quick-disconnect style connections. 2. Length: This listing is the 240" (20 ft) version — the longest in the 100251 family. If your run is shorter, the 100251-120 (10 ft) or other shorter lengths may be more appropriate and easier to route cleanly. 3. Routing path: While kink-resistant, plan your routing to avoid unnecessary sharp bends or contact with hot surfaces, especially over a longer hose run. If you are unsure which length or fitting configuration your system requires, consult your appliance or regulator's documentation, or contact MB Sturgis directly.
Installation Steps: 1. Shut Off Gas Supply: Close the gas supply at the source before beginning any installation or replacement work 2. Verify Fitting Compatibility: Confirm both ends of your connection points use mating 1/2" male flare fittings 3. Plan the Routing Path: Over a 20 ft run, plan your path to avoid sharp bends, pinch points, or contact with hot surfaces while securing the hose along the way 4. Connect Fittings: Thread each 1/2" female flare swivel onto its mating male flare fitting and hand-tighten, then secure with a wrench 5. Tighten Securely: Tighten both connections to a secure, leak-free fit without overtightening 6. Leak Test: Restore gas supply and perform a soap-and-water leak test on both connections before use Gas line work should be performed or verified by a qualified technician. Always leak-test connections before placing the system into service.
In The Package: • (1) 100251-240 High Pressure LP/Natural Gas Hose — 240" Length • 1/2" Female Flare Swivel Fitting (Both Ends) NOT Included: • Mating male flare fittings • Thread sealant • Hose clamps or securing hardware for long routing runs
MB Sturgis Technical Support: Phone: (314) 291-6665 Email: [email protected] MB Sturgis Inc. has supplied OEMs, distributors, gas installers, and end users with safe LP and natural gas connection products since 1959.