[Lifetime Warranty] F273699 Propane Fuel Filter - for Mr Heater, Buddy Heater, Big Buddy, Tough Buddy Heaters & Portable Buddy - Fit F273704 F273701 F273702 - Pack of 2
Two F273699 propane fuel filters for Mr. Heater portable heaters with protective caps.
F273699 propane fuel filter shown with CSA certification document for Mr. Heater compatibility.
Diagram showing F273699 propane fuel filter connector types for Mr. Heater Buddy and Big Buddy heaters.
Dimensional diagram of F273699 propane fuel filter for Mr. Heater showing length and width measurements.
Infographic showing high-grade materials of F273699 propane fuel filter, including brass core and galvanized aluminum.
F273699 propane fuel filter for Mr. Heater Buddy portable heaters shown with compatible heater model.
Installation diagram for F273699 propane fuel filter showing connection between portable heater and propane tank.
F273699 propane fuel filter for Mr. Heater portable heaters shown in a lifestyle camping setting.
Comparison chart showing BlueStars propane fuel filter durability versus generic heater filter alternatives.
Two F273699 propane fuel filters for Mr. Heater portable heaters with protective caps.
F273699 propane fuel filter shown with CSA certification document for Mr. Heater compatibility.
Diagram showing F273699 propane fuel filter connector types for Mr. Heater Buddy and Big Buddy heaters.
Dimensional diagram of F273699 propane fuel filter for Mr. Heater showing length and width measurements.
Infographic showing high-grade materials of F273699 propane fuel filter, including brass core and galvanized aluminum.
F273699 propane fuel filter for Mr. Heater Buddy portable heaters shown with compatible heater model.
Installation diagram for F273699 propane fuel filter showing connection between portable heater and propane tank.
F273699 propane fuel filter for Mr. Heater portable heaters shown in a lifestyle camping setting.
Comparison chart showing BlueStars propane fuel filter durability versus generic heater filter alternatives.
Lifetime Warranty

[Lifetime Warranty] F273699 Propane Fuel Filter - for Mr Heater, Buddy Heater, Big Buddy, Tough Buddy Heaters & Portable Buddy - Fit F273704 F273701 F273702 - Pack of 2

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F273699 Propane Fuel Filter - for Mr Heater, Buddy Heater, Big Buddy, Tough Buddy Heaters & Portable Buddy - Fit F273704 F273701 F273702 - Pack of 2

Key Features

  • Package contains two (2) fuel filters.
  • Removes contaminants from propane supplied by bulk cylinders.
  • Protects heater from oily residue and particles in the fuel line.
  • Designed for use with a bulk cylinder and hose assembly.
  • Constructed from cast aluminum.

Replaces / Cross-Reference Part Numbers

  • F273699
  • F273704

Compatibility & Fitment

  • Heater Models: Mr. Heater Portable Buddy, Big Buddy, Tough Buddy
  • Hose Assemblies: Recommended for use with F273701, F273702, F273703, F273718, F298802

When to Replace

  • Replace annually as part of routine maintenance.
  • Replace immediately if the filter appears clogged or damaged.
  • Replace if the heater exhibits inconsistent flame or signs of fuel starvation.

Installation Tips

  • Ensure the propane cylinder valve is fully closed before installation.
  • The filter installs directly onto the heater's swivel regulator inlet.
  • Attach the propane hose to the other end of the filter.
  • Check all connections for leaks with a soapy water solution before operating the heater.

FAQ

This filter is used with Mr. Heater Buddy-series propane heaters, including Buddy Heater, Portable Buddy, Big Buddy, and Tough Buddy models. It is typically installed when using a bulk propane cylinder with a hose assembly, rather than running directly from a small disposable cylinder.
This item is associated with part number F273699 and is commonly used with hose assemblies or related setups referenced by F273704, F273701, and F273702. Always match the part number on your existing filter or heater/hose documentation before ordering.
The filter helps trap oil and other contaminants that can travel from a bulk propane tank through the hose assembly. This helps protect the heater's fuel system and can reduce performance problems or malfunctions caused by contamination reaching the regulator or burner components.
Common signs include reduced heater performance, harder starting, inconsistent flame, nuisance shutdowns, or a heater that works poorly when connected to a larger propane tank and hose setup. If your heater runs normally on a small disposable cylinder but acts up on a bulk tank connection, the filter and hose contamination are worth checking.
A common recommendation is annual replacement, especially if you regularly run the heater from a 20 lb. or larger propane cylinder with a hose. If the heater sees heavy seasonal use, or if you suspect oil contamination in the hose system, inspect and replace the filter sooner.
Installation is usually straightforward. In most cases, you shut off the propane supply, disconnect the hose, thread the filter into the correct inline connection point, and reconnect the hose. It generally takes only a few minutes. Depending on your setup, you may need basic hand tools to snug the fittings. After installation, check all connections for leaks with a soap-and-water solution before operating the heater.
Inspect the propane hose for wear, cracking, kinks, or oil contamination, and make sure the tank connection and heater inlet threads are clean and undamaged. If you have ongoing performance issues after replacing the filter, also check the regulator, hose assembly, and propane supply condition. Contamination problems are most common on bulk-cylinder hose setups, so the entire fuel path should be inspected.