F273704 10FT Propane Hose Adapter - For Mr. Heater Big Buddy MH18B, Little Buddy MH9B, Portable Buddy MH9BX Heater
10ft propane hose adapter for Mr. Heater Big Buddy with brass fittings and protective cap.
Propane hose adapter connectors showing POL inlet and 1-20 male thread dimensions for Mr Heater Big Buddy compatibility.
10ft propane hose adapter connecting to a standard propane tank valve.
Diagram showing the three-layer construction of the 10ft propane hose for Mr. Heater Big Buddy.
Infographic showing high-grade material details of the 10FT propane hose adapter for Mr. Heater Big Buddy.
10ft propane hose adapter for Mr. Heater Big Buddy shown with compatible grills, stoves, griddles, and fire pits.
10ft propane hose adapter for Mr. Heater Big Buddy shown with grill setup and installation instructions.
10ft propane hose adapter for Mr. Heater Big Buddy shown in a lifestyle graphic for outdoor cooking and grilling.
10ft propane hose adapter for Mr. Heater Big Buddy with brass fittings and protective cap.
Propane hose adapter connectors showing POL inlet and 1-20 male thread dimensions for Mr Heater Big Buddy compatibility.
10ft propane hose adapter connecting to a standard propane tank valve.
Diagram showing the three-layer construction of the 10ft propane hose for Mr. Heater Big Buddy.
Infographic showing high-grade material details of the 10FT propane hose adapter for Mr. Heater Big Buddy.
10ft propane hose adapter for Mr. Heater Big Buddy shown with compatible grills, stoves, griddles, and fire pits.
10ft propane hose adapter for Mr. Heater Big Buddy shown with grill setup and installation instructions.
10ft propane hose adapter for Mr. Heater Big Buddy shown in a lifestyle graphic for outdoor cooking and grilling.

F273704 10FT Propane Hose Adapter - For Mr. Heater Big Buddy MH18B, Little Buddy MH9B, Portable Buddy MH9BX Heater

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$29.99
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$29.99
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Enter appliance or equipment model number to verify compatibility with this part

F273704 10FT Propane Hose Adapter for Mr Heater

Key Features

  • Length: 10 feet (3.05 meters)
  • Connects appliances designed for 1 lb propane cylinders to 5-20 lb bulk tanks
  • Inlet Connection: P.O.L. (CGA510)
  • Outlet Connection: 1 in-20 Male Throwaway Cylinder Thread
  • Hand-tighten swivels on both ends for tool-free installation
  • Flexible, thermoplastic construction resists oil contamination
  • Does not require an inline fuel filter with compatible heaters

Replaces / Cross-Reference Part Numbers

  • Mr. Heater: F273704

Compatibility & Fitment

  • Designed for use with Mr. Heater portable propane heaters
  • Fits Mr. Heater Buddy Heaters: MH9BX
  • Fits Mr. Heater Big Buddy Heaters: MH18B
  • Fits Mr. Heater Tough Buddy Heaters
  • Fits Mr. Heater Buddy FLEX Heaters
  • Compatible with most appliances that use a 1 lb disposable propane cylinder

When to Replace

  • Visible damage such as cracks, abrasions, or brittleness
  • Persistent gas leaks after tightening connections
  • Stiff or inflexible hose material from age or degradation
  • Clogged or restricted gas flow causing poor appliance performance

Installation Tips

  • Ensure all connections are hand-tightened securely before use
  • Check for leaks at all connection points with a soapy water solution before igniting
  • Position the hose to avoid kinks, sharp bends, or contact with hot surfaces
  • Connect the hose to the appliance first, then to the bulk propane tank
  • When disconnecting, shut off the gas valve on the tank first
F273704 10FT Propane Hose Adapter - For Mr. Heater Big Buddy MH18B, Little Buddy MH9B, Portable Buddy MH9BX Heater 1
F273704 10FT Propane Hose Adapter - For Mr. Heater Big Buddy MH18B, Little Buddy MH9B, Portable Buddy MH9BX Heater 2
F273704 10FT Propane Hose Adapter - For Mr. Heater Big Buddy MH18B, Little Buddy MH9B, Portable Buddy MH9BX Heater 3
F273704 10FT Propane Hose Adapter - For Mr. Heater Big Buddy MH18B, Little Buddy MH9B, Portable Buddy MH9BX Heater 4
F273704 10FT Propane Hose Adapter - For Mr. Heater Big Buddy MH18B, Little Buddy MH9B, Portable Buddy MH9BX Heater 5
CONVENIENT USE

CONVENIENT USE

1. Designed with a POL connection, eliminating the need for a fuel filter, you can attach it directly to your propane tank for easy use.
2. This hose can be used to connect to low-pressure as well as high-pressure propane tanks.
You can enjoy grilling or heating for longer by connecting appliances that are designed for 1lb propane tanks to 5-20lb propane tanks.
Note: Please inspect for gas leakage carefully after installation and tighten as needed.

Compatible Models

Locate the model number of your appliance or equipment on the manufacturer's label and use it to check compatibility before ordering

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FAQs

This hose adapter is intended for Mr Heater Big Buddy portable propane heaters that use part number F273704. Match your heater model and connection style to the original part number before ordering.
This hose adapter matches part number F273704.
Common signs include visible cracking in the hose, propane odor near the fittings, difficulty maintaining a seal at the connection points, intermittent fuel flow, or wear at the threaded ends. If any leak is suspected, stop using the heater until the hose and fittings are inspected.
Installation is usually straightforward: disconnect the propane supply, make sure the heater is fully off and cool, thread the hose adapter onto the correct fittings, and tighten securely without overtightening. Most installations take only a few minutes. After installation, perform a leak check with a soap-and-water solution at all connections before operating the heater.
Verify that the heater side fitting and the propane supply side fitting match your existing setup, confirm you are replacing F273704, and inspect the heater's fuel inlet and regulator connection for damaged threads or debris. If the old hose failed from cracking or leakage, also inspect the propane cylinder connection points for wear.
They commonly fail from age, repeated bending near the ends, abrasion during storage or transport, damaged threads, or exposure to heat and weather. Poor sealing can also come from dirt on the fittings or cross-threading during installation.