11 Mr Heater F273699 Fuel Filter Reviews of 2026 To Stop Hose Oils

1

F273699 Propane Fuel Filter for Mr. Heater Buddy & Big

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  9.5
• Brand
  BOUYAO

Key specs2

Hose Compatibility

• F273701 bulk tank hose
• F273702 quick-disconnect hose
• F298802 extension hose

Thread Protection

Plastic cap included

Pros & cons42

Pros

• Direct replacement for Mr. Heater part numbers F273699 and F276163
• Solid brass joint resists thread stripping during installation
• Fits standard F273701, F273702, and F298802 propane hoses
• Includes a protective plastic cap to keep dust off the threads

Cons

• Listed dimensions of 0.1 x 0.1 x 0.1 inches are inaccurate place-holders
• Requires careful hand-tightening to avoid damaging the brass threads

2

F273699 Propane Fuel Filter Fits for Mr. Heater Big Buddy

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  9.4
• Brand
  PROSOCOOL

Key specs2

Buddy Heater Fit

• Portable Buddy
• Big Buddy
• Hunting Buddy

Unit Weight

0.57 lb

Pros & cons32

Pros

• Compatible across Hunting Buddy, Portable Buddy, and Big Buddy models
• Connects with standard F273701, F273702, and F273703 bulk hose lines
• Solid 0.57-pound build provides durable inline fuel filtering

Cons

• Product listing omits specific metal composition for the housing
• Package does not include a protective cap for exposed threads

3

F273699 Fuel Filter for Mr. Heater Portable Buddy, Big Buddy,

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  9.2
• Brand
  COKNUMBER

Key specs2

Body Material

Zinc alloy with brass core

Broad Hose Fit

• F273701 standard hose
• F273702 assembly
• F273704 bulk hose
• F298802 line

Pros & cons42

Pros

• Sturdy zinc alloy housing paired with a solid brass core interface
• Compatible with Tough Buddy, Big Buddy, and Portable Buddy heaters
• Supports four common hose types including F273704 and F298802
• Includes a protective cover to shield connection threads from dirt

Cons

• Catalog dimensions of 0.1 x 0.1 x 0.1 inches lack true measurements
• Requires checking the seal with soapy water before first operation

4

CALPOSE F273699 Propane Fuel Filter for Mr.Heater Buddy

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  9.0
• Brand
  CALPOSE

Key specs2

Construction Material

Galvanized aluminum and brass

Mounting Location

Connects between the heater regulator inlet and the propane hose line rather than directly to the bulk cylinder valve.

Pros & cons32

Pros

• Built with galvanized aluminum housing and a solid brass core
• Fits four bulk hose variants including long F273718 assemblies
• Installs by hand directly to heater inlet without specialized tools

Cons

• Listing provides contradictory dimensions between description and specs
• Cannot connect directly to tank valves and requires an appliance inlet fit

5

BlueStars F273699 Propane Fuel Filter - for Mr Heater, Buddy

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  8.7
• Brand
  BlueStars

Key specs3

Safety Certification

CSA C-US certified (No. 2055063)

Pack Quantity

2 pack

Supported Replacement Numbers

• F273701 and F273702 hoses
• F273703 and F273718 hoses
• Part numbers 6351206 and 6351200

Pros & cons42

Pros

• Certified to CSA C-US standards (No. 2055063) for pressure integrity
• Two-pack bundle provides an immediate replacement for a second heater
• Galvanized aluminum body with solid brass core and PVC dust covers
• Supports extensive part cross-references including 6351206 and 6351200

Cons

• Bundled two-pack format may exceed the needs of single heater owners
• Listed 1 x 1 x 1 inch dimensions do not convey true exterior size

6

For F273699 Filter for Mr.Heater Portable Buddy Heater Propane Fuel

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  8.3
• Brand
  FOLIAGE

Key specs1

Specification Notes

Verify thread diameter and heater inlet clearance prior to installation as specific hose models are unlisted.

Pros & cons32

Pros

• Matches standard F273699 thread specifications for Portable Buddy heaters
• Filters propane line contaminants to prevent pilot orifice clogs
• Inline configuration attaches directly to the heater fuel connection

Cons

• Listing omits specific metal material details and certifications
• Does not state specific compatible hose model numbers or include a cap

7

Mr. Heater Fuel Filter for Big Buddy & Portable Buddy

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  8.1
• Brand
  Mr. Heater

Key specs2

Brand Line

Genuine Mr. Heater OEM part

Exterior Dimensions

5.75 x 4.5 x 2.75 in

Pros & cons32

Pros

• Genuine Mr. Heater factory component under part number F276163
• Galvanized aluminum construction resists moisture and corrosion
• Verified manufacturer dimensions of 5.75 x 4.5 x 2.75 inches

Cons

• Designed specifically for appliance regulators and cannot mount to tanks
• Data does not confirm fit with Hunting Buddy or Tough Buddy variants

8

Mr Heater F273699 Fuel Filter

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  8.0
• Brand
  Mr. Heater

Key specs2

OEM Fitment

Factory part F273699

Regulator Clearance

Compact 1.55-inch profile installs cleanly onto Buddy regulator inlets without interfering with heater housings.

Pros & cons32

Pros

• Original equipment manufacturer Mr. Heater F273699 filter
• Compact 1.55 x 1.55 x 1.55 inch size fits confined regulator spaces
• Engineered to stop oily hose plasticizers from fouling Buddy regulators

Cons

• Specification table contains an unrealistic weight entry of 0.000625 lb
• Product listing provides sparse detail regarding included accessories

9

F273699 Heater Propane Fuel Filter for Mr. Heater Big Buddy,

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  7.9
• Brand
  DuckcowsC

Key specs2

Core Material

Polished solid brass core

Compatible Hoses

• F273701 rubber hose
• F273702 quick disconnect
• F273703 extension line
• F273718 bulk hose

Pros & cons42

Pros

• Solid brass core finished with multi-step polishing for smooth threads
• Traps plasticizer oils from new rubber hoses before reaching the burner
• Compatible with Hunting Buddy, Big Buddy, and Portable Buddy models
• Includes a protective plastic cap to keep connection threads clean

Cons

• Must be hand-tightened carefully to avoid cross-threading brass ports
• Requires soapy water leak checks after each cylinder reconnection

10

FJXBYWM Propane Fuel Filter F273699 for Portable Propane Heaters &

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  7.3
• Brand
  FJXBYWM

Key specs2

Hose Compatibility List

• F273701 and F273702
• F273703 and F273704
• F273718 propane hose

Weight Rating

0.51 lb

Pros & cons32

Pros

• Traps oily contaminants across five hose types including F273704
• Weight of 0.51 pounds indicates a substantial all-metal build
• Compact 2.5 x 1 x 0.3 inch profile keeps hose connections unobtrusive

Cons

• Specification list omits the exact metal alloys used in construction
• Listing does not confirm whether a thread protective cap is included

11

F273699 Fuel Filter for Mr. Heater Buddy, Big Buddy &

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  7.2
• Brand
  PROSOCOOL

Key specs2

Supported Buddy Models

• Portable Buddy
• Big Buddy
• Tough Buddy

Fitting Mass

0.60 lb

Pros & cons42

Pros

• Designed for pressurized lines with F273701 and F273702 hoses
• Compatible with Tough Buddy along with Portable and Big Buddy heaters
• Substantial 0.60-pound weight reflects heavy-duty metal components
• Direct replacement for original Mr. Heater part number 273699

Cons

• Lacks stated compatibility with longer F273703 or F273718 hoses
• Package does not specify an included plastic cap to protect threads

Last update on 2026-10-24 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Do I really need the F273699 fuel filter when running a Buddy heater from a bulk tank?

Yes, the F273699 filter is required when connecting Mr. Heater Portable Buddy and Big Buddy heaters to bulk propane tanks using high-pressure hoses. Flexible propane lines can leach residual oils and plasticizers that travel straight into the heater. The filter acts as an inline barrier that traps hose oils, dirt, and unwanted particles before they reach internal mechanisms, preventing pilot clogs and fuel flow failures in freezing weather.

Does the F273699 filter attach to the heater inlet or directly to the propane tank?

The fuel filter threads directly onto the heater fuel inlet, not onto the bulk tank valve. Placing the filter right at the heater ensures it catches residual oils and debris picked up across the full run of hose assemblies like F273701 or F273702. Thread the filter firmly onto the heater intake by hand, attach your bulk hose to the inlet side of the filter, and verify the seal with soapy water before opening the tank valve.

Which heater models and hose assemblies work with the F273699 filter?

The F273699 filter, which also replaces part number F276163, is compatible with Mr. Heater Portable Buddy, Big Buddy, Hunting Buddy, and Tough Buddy heaters. It is engineered to pair with standard propane hose assemblies including F273701, F273702, F273703, F273704, F273718, and 63512. While larger residential equipment like a tankless propane water heater uses hard lines and exterior low-pressure regulators, portable Buddy heaters rely directly on this accessory to manage high-pressure hose contaminants.

Are aftermarket F273699 replacements as reliable as original Mr. Heater filters?

Yes, quality aftermarket F273699 replacements provide dependable protection when built with solid brass cores and galvanized aluminum outer bodies. Solid brass threading ensures clean mating against the heater inlet without cross-threading or gas leaks, while galvanized aluminum protects the housing from damage during transport. Confirming proper material construction and checking connection points with soapy water guarantees reliable performance without fuel leaks.

How does the F273699 filter stop hose oils from reaching the burner?

High-pressure rubber hoses release oily residue and debris under continuous propane pressure, especially during initial seasonal use. The F273699 inline filter captures these impurities within its internal media before the gas reaches the sensitive regulator and pilot orifice. This keeps fuel transmission smooth and prevents heater shutdowns during cold outdoor activities like camping, ice fishing, and hunting.

Can I use the F273699 filter on other propane appliances?

The F273699 filter is designed for small to medium portable heaters and compatible outdoor propane accessories. It fits appliances engineered for 1-pound disposable cylinder connections that are converted to bulk tanks via hoses like F273701 or F273704. Permanent gas appliances, such as a dedicated bulk propane tankless water heater, use dedicated high-volume pipe setups that do not utilize this specific portable filter.