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Guinness U-System Keg Coupler - Micro Matic G9502 Chrome Plated Brass Sanke Hub
$89.99
Micro Matic Keg Couplers
Keg coupler finder
Find the right coupler for your beer
Type your beer brand to see which coupler system its keg uses — then shop the exact coupler.
Micro Matic KK-713-058 KeyKeg System Coupler Gas Port - 3/8" OD Barb
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Micro Matic FD-C-A Specialty Keg Coupler - SS Body
$69.41
Micro Matic 7485BB D' System Coupler - SS Probe Black
$32.11$69.99Save 54%
Micro Matic 7485SS G' System Keg Coupler - SS Probe
$52.95
Micro Matic 703-121 Coupler Part Non-Return Torpedo Valve Stainless Steel
$9.50
Micro Matic 401-038 Check Valve Coupler Parts for G408 and GTL425
$9.28
Micro Matic G408 U' System Keg Coupler - SS Body
$85.58
Micro Matic 854-1P 5/16" Female In-Line Gas Quick Disconnect - Shut-Off Coupler
$9.98
Micro Matic 896EP 5/16" In-Line Gas Quick Disconnect - Female Coupler with Shut-Off
$9.76
Micro Matic MM-BC3-KIT Connection Assembly Kit - Shanks & Couplers
$27.60
Micro Matic 7485BB-R "D" System Keg Coupler - Chrome Plated Brass, Red Handle
$45.99
Micro Matic 7485BB-B "D" System Keg Coupler - Chrome Plated Brass, Blue Handle
$33.14
Micro Matic 733-363 Stainless Steel Hinge Pin - Replacement for "D" & "S" System Couplers
$2.68
Keg Coupler Sankey Tap Bottom Seal
$7.97
Replacement Beer Keg Coupler Seal for Cleaning Cans & Beverage Tanks
$22.55
Micro Matic FD-C-S Coupler Draft Beer System Parts Stainless Steel with Quick Disconnect
$69.41
Micro Matic 102-536 Center Valve Assembly - Replacement Part for "D" & "S" System Couplers
$41.33
Micro Matic 7486BB 3.5 Inch S System Keg Coupler with Chrome-plated Brass Body and Probe Blue
$44.69
Micro Matic FT872 Keg Coupler Elbow 90° Stainless Steel Keg Accessories
$21.18
Micro Matic 112-480 Handle Hinge Pin - DH1501 Coupler
$8.99
Micro Matic 102-566 Body O-Ring - Replacement Seal for G408 & GTL425 Couplers
$7.43
Micro Matic 1900671 Keg Coupler Cleaning Brush - SS
$7.86
Micro Matic 'S' System Keg Coupler - Stainless Steel Probe with Brass Body
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Keg coupler systems: how to find the right one
A keg coupler taps your keg and connects the gas and beer lines, but couplers are not universal — the coupler has to match the keg's valve. Six systems cover almost every keg sold in the U.S.: D (American Sankey), S (European Sankey), A (German slider), G (Grundy), M, and U (UEC / Guinness), plus one-way KeyKeg couplers. To pick the right one, match the system to the beer brand or check the keg's valve. This guide covers U.S.-distributed kegs — a brand's system can change by region or importer, so confirm with your distributor when in doubt.
D System (American Sankey)
The most common coupler in the U.S. The D system taps all the major domestic breweries — Anheuser-Busch (Budweiser, Michelob), Miller, Molson-Coors, Yuengling — and the large majority of US craft breweries. If you're tapping a US-made keg, it's almost always a D.
S System (European Sankey)
Many European imports use the S system, distinguished by a longer, narrower probe than the D. It taps brands such as Heineken, Beck's, Amstel Light, and Pilsner Urquell. It resembles the D but is not interchangeable.
A System (German Slider)
Called the German Slider because it slides onto the valve face. The A system taps many German and Belgian brands such as Paulaner, Spaten, Warsteiner, and Hoegaarden.
G System (Grundy)
Named after its English developer, Grundy. The G system taps English ales and a few specialty kegs — Bass, Boddington's, Caffrey's, and Anchor Steam (50-liter kegs). Don't confuse it with the German A slider; the valve faces differ.
U System (UEC) - Guinness & nitro stouts
Named for the English manufacturer UEC. The U system taps Guinness and Harp, and is what you need for UK/Irish nitro stouts (paired with nitrogen or a beer-gas blend for the cascading pour).
M System & KeyKeg
The M system shares the German-slider body but uses a unique probe; it taps brands such as Schneider, Aventinus, and Einbecker. KeyKeg couplers are different again — they tap the one-way, recyclable KeyKeg format used by many import and craft brewers. Match the coupler to the keg format, not just the brand.
Not sure which coupler you need?
If you can't identify the system from the keg, our team has spec'd draft systems for 20+ years — call 888-964-4239 or use live chat and we'll match the right Micro Matic coupler to your keg.
Keg coupler FAQs
How does a keg coupler work?
A keg coupler connects to the keg's valve and links your gas and beer lines. Pressurized gas (CO2 or nitrogen) flows in through the coupler to push beer up the beer line and out the faucet. Engaging the coupler's lever opens the keg's valve.
How do I know which keg coupler I need?
Match the coupler to the keg's valve system. As a rule of thumb: US domestic and most US craft use D (American Sankey); most European imports (Heineken, Beck's, Amstel, Pilsner Urquell) use S; German and Belgian brands (Paulaner, Spaten, Warsteiner, Hoegaarden) use A; English ales (Bass, Boddington's) use G (Grundy); and Guinness and UK/Irish nitro stouts use U. A brand's system can vary by region or importer, so confirm with your distributor when in doubt.
What's the difference between a D and S system coupler?
Both are Sankey-style and look similar, but the S system has a longer, narrower probe, so they are not interchangeable. D (American Sankey) taps US beers; S (European Sankey) taps most European imports like Heineken and Beck's.
Do I need a special coupler for Guinness or nitro stouts?
Yes — Guinness and most UK/Irish nitro stouts use the U system coupler, paired with nitrogen or a beer-gas (CO2/N2) blend to create the cascading nitro pour.
Can I use an adapter instead of the correct coupler?
Adapters exist for some conversions, but using the correct coupler for the keg's system is the most reliable option and avoids leaks or poor pours. When in doubt, match the coupler to the keg.
Are these genuine Micro Matic couplers?
Yes. Every coupler here is genuine Micro Matic, listed by manufacturer part number, with replacement parts (seals, probes, handles) available.