Mr. Heater F273699 Universal Propane Fuel Filter for Buddy Heaters
A short aluminum-bodied inline filter that screws between the hose and the heater inlet on the Portable Buddy, Big Buddy, and Tough Buddy (not the Little Buddy, which runs on 1-lb cylinders only). Its job is to catch the oil and contaminant residue that accumulates in bulk tanks and refilled cylinders before it reaches the heater's fuel orifice. Mr. Heater specifies this filter for any Buddy heater running on a 20-lb tank and hose, and recommends replacing it once a season.
Check Latest Price on Amazon →Why You Need This
The failure is quiet: a Buddy heater runs fine for a season, then the flame gets lazy, then it will not stay lit, and a technician tells you the fuel orifice is fouled with oil from the bulk tank. The fix at that point is not $16. Mr. Heater's own instructions call for this filter whenever the heater runs on a hose and a refillable tank — it is cheap protection for the part you cannot easily clean.
🏆 How It Compares
The least glamorous $16 in a cold-weather kit and one Mr. Heater actually specifies: install it between the hose and the heater when running a 20-lb tank, replace it each season, and the heater keeps the flame it had when it was new.
Pros & Cons
✅ Pros
- Protects the heater's small fuel orifice from the oil and moisture that bulk tanks and refilled cylinders carry
- Mr. Heater specifies it for hose-and-20-lb-tank Buddy setups — it is part of running the heater the way the manual describes
- $16 of insurance in front of a $70-150 heater that gets weak and then refuses to light once the orifice clogs
- Brass and aluminum body with standard threaded fittings — screws inline by hand between hose and heater
❌ Cons
- Pointless if you only ever run 1-lb disposable cylinders — the filter is for bulk-tank and refilled-bottle setups
- One more threaded connection to leak-test and keep snug every time you set the heater up
- A consumable: replace roughly once a season, so budget for it annually
🎯 Who Is This For?
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Frequently Asked Questions
What is the Mr. Heater F273699 Universal Propane Fuel Filter for Buddy Heaters best for?
Buddy heater owners running a 20-lb tank and hose who want the heater to keep its full output season after season
Who should buy the Mr. Heater F273699 Universal Propane Fuel Filter for Buddy Heaters?
Anyone who bought the F273704 hose (or Mr. Heater's other Buddy hoses) to run a heater off a 20-lb tank Campers who refill their own 1-lb propane bottles and want to keep the contaminants those refills introduce out of the heater Ice fishing, deer camp, and cabin users who leave a radiant propane heater running daily through the cold months People whose Buddy heater has already started behaving like it is hunting for fuel
What problem does the Mr. Heater F273699 Universal Propane Fuel Filter for Buddy Heaters solve?
The failure is quiet: a Buddy heater runs fine for a season, then the flame gets lazy, then it will not stay lit, and a technician tells you the fuel orifice is fouled with oil from the bulk tank. The fix at that point is not $16. Mr. Heater's own instructions call for this filter whenever the heater runs on a hose and a refillable tank — it is cheap protection for the part you cannot easily clean.
What are the drawbacks of the Mr. Heater F273699 Universal Propane Fuel Filter for Buddy Heaters?
Owners and reviewers call out a few trade-offs: Pointless if you only ever run 1-lb disposable cylinders — the filter is for bulk-tank and refilled-bottle setups One more threaded connection to leak-test and keep snug every time you set the heater up A consumable: replace roughly once a season, so budget for it annually
How much does the Mr. Heater F273699 Universal Propane Fuel Filter for Buddy Heaters cost?
It is listed at $15.97 on Amazon. Prices on Amazon move around, so check the current price before you buy.
What do owners say about the Mr. Heater F273699 Universal Propane Fuel Filter for Buddy Heaters?
It carries a 4.7-out-of-5 rating from 201 Amazon customer reviews.
Have a question we did not answer? The Amazon listing carries the full spec sheet and customer Q&A.
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