Filter barb max od is .198 (5mm). Large enough for 1/8" and 5/32" fuel line. Useful for both gas and glow. Filter may be taken down for cleaning. O-ring external seal and internally against filter bypass. Inlet is long section of aluminum housing.
The DU-BRO Clunks are dependable, high-quality fuel pickup weights designed to keep fuel flowing smoothly to your engine throughout every phase of flight. Whether your airplane is climbing, diving, or performing aerobatics, the clunk inside your tank must stay submerged in fuel--and DU-BRO's precision-made clunks do exactly that.
These clunks are available in both Standard and Large sizes, giving you flexibility for different tank sizes and fuel demands. The Standard Clunk weighs 7.5 grams (0.26 oz.), making it ideal for most sport and scale aircraft. The Large Clunk weighs 13.6 grams (0.48 oz.) and is perfect for bigger engines, larger fuel tanks, or models that require more consistent fuel pickup in extreme maneuvers.
Each clunk is nickel plated, which helps prevent corrosion caused by glow fuel or gasoline. This creates a long-lasting, durable component that performs reliably over time. DU-BRO also machines fuel line barbs directly into the clunk, helping secure your fuel tubing so it won't slip off inside the tank--a critical feature for safe and dependable fuel delivery.
DU-BRO clunks are great for:
Glow and gas engines
Pattern planes, sport models, scale aircraft
Large tanks needing strong, consistent pickup
Pilots who want trouble-free fueling performance
Installation is simple: attach the clunk to your pickup line, insert it into the fuel tank, and enjoy reliable fuel flow on every flight.
Proudly Made in the USA, DU-BRO Clunks offer strong construction, corrosion resistance, and dependable performance--making them a smart upgrade or replacement for any RC fuel system.
SKU Number: DUB838
RC Fuel Filters
A fuel filter traps dirt and debris before it can reach a carburetor or clog a fuel line, and it is cheap insurance against a lean run or a dead-stick landing. This category collects inline and in-tank filters for glow and gas powered models.
Inline Filters
Inline filters sit in the fuel line between tank and engine. Options here include the Radical RC inline fuel filter and Sullivan double-screen visible filters, offered in standard and large sizes, whose clear bodies let you see when it is time to clean or replace them.
Clunk and Tank Filters
Clunk-style filters attach to the weighted pickup inside the tank, drawing filtered fuel from the lowest point in any attitude. The Du-Bro clunk filter and the Radical RC klunk fuel filter in a 10mm size serve this role.
Compare the filter styles on this page to match one to your fuel system.
 "Radical RC Inline Fuel Filter")
 "Du-Bro Clunk Filter")
 "Sullivan Double Screen Visible Filter")
 "Sullivan Double Screen Visible Filter LARGE")
 "Radical RC Klunk Fuel Filter 10mm")
 "Radical RC Klunk Fuel Filter 12mm")
 "RRC Sintered Clunk Filter")
 "RRC Sintered Filter with Serviceable Aluminum Housing")
 "Sullivan Super Klunk")
 "DU-BRO Clunks - Standard & Large Nickel-Plated RC Fuel Clunk")
