Parts of a Standard Beer Faucet – A Handy Diagram

Draft beer faucets look pretty straightforward, and in many ways they are. But they are also made up of a slew of smaller parts, and each one is essential to the assembly’s proper function. Over time, these smaller parts wear and tear, which can lead to leaks and other malfunctions. When this happens, it’s a good idea to have an understanding of how the parts of your faucet fit together so you can replace them easily. With a little know-how you can also refurbish an old beer faucet or build one from scratch. That’s where a beer faucet diagram comes in handy.

Standard, Rear-Closing Beer Faucets

The most common type of beer faucet is the standard, rear-closing faucet. With this type of faucet, you actuate beer dispensing by pulling on a tap handle. That movement activates a lever that pushes open an internal valve, allowing beer to flow through the faucet body to a waiting glass.

parts of a beer faucet
The Standard Faucet, Dissected

  1. Faucet Knob: The tapered black handle that connects to and controls the lever. It’s the part you pull forward to initiate beer dispensing. It can be replaced with a branded, novelty, or custom handle.
  2. Lever Collar: A small piece of metal hardware that holds the faucet lever assembly secure. It also helps align a branded tap marker so that it is forward facing and visible to users and consumers.
  3. Lever Bonnet: When paired with a friction washer, it creates the friction necessary to open and close the beer faucet.
  4. Friction Washer: This friction created by this small but significant faucet part prevents the lever from sliding loosely during use.
  5. Ball Washer: It’s the first piece that goes onto the faucet lever, where it seals the faucet to prevent spray. If the ball washer looks dingy, dirty, or moldy, it’s a sign of infection.
  6. Lever: The metal piece that controls the opening and closing of the internal valve that controls the flow of beer through the faucet body. When you pull the lever forward by way of the tap handle, it pushes the shaft backwards, which opens the valve. Levers are threaded to attach to the faucet knob/tap handle.
  7. Faucet Body: The largest single component of your beer faucet, it directs the flow of beer through the spout to your waiting glass.Faucets come in different finishes. We recommend stainless steel to ensure off, metallic flavors don’t taint your beer.
  8. Coupling Washer: Seats the faucet to the beer shank for a leak-free connection.
  9. Shaft: Connected to the lever, it is pushed forward or pulled back to control the flow of fluid.
  10. Shaft Seat/Seating Washer: Seals the valve to stop the flow of beer. As it wears with age, you may experience a small, slow leak.
  11. Shaft Nut: The metal fastener that secures the shaft seat to the shaft.
  12. Faucet Shaft Assembly: The term for the shaft, seat, and nut when referencing it as one unit.

Have Questions?

We carry a full line of draft beer replacement parts and staff draft beer specialists who can help pinpoint your faucet problems. If you have questions, give us a call at 877.636.3673, send us a Facebook message, or drop a comment below!



  • Don April 28, 2017 @ 3:56pm

    I have a new double-faucet set up. Problem is one of the beers is Goose Island with their goose-head marker. The center of gravity is forward of the vertical, so it has opened on its own — not a pretty picture. I’ve had to turn it backwards until I figure out a fix. Any help? I think I’ve seen some faucets with a bit of an angle backwards. Am I correct?
    Thanks — you guys have been a great help with my draft setups.

  • Tony Maki April 30, 2017 @ 7:37pm

    If I haven’t poured a beer for a few days, when I go to pull forward on the faucet knob, it is sticky and hard to pull. It eventually breaks free and then is easy to pull. What causes this and how can I prevent it from happening? Thanks!

    • Draft Tech May 15, 2017 @ 3:35pm

      The cause of your sticky faucet is beer. Untap your keg and disassemble your faucet. Clean it thoroughly. At this point I’m going to guess your beer line also needs to be cleaned. Hot water and sanitizer should do the trick after packing your beer line w/ sanitizer/ beer line cleaner let it sit for 10min afterwards flush the sanitizer / beer line cleaner from your lines using cold water until you feel that all the cleaner has been removed. This will take care of any off flavors caused from dirty lines and faucets. Cheers!

    • Markcat4 March 26, 2019 @ 4:36pm

      They make a food grade grease that I had bought at my homebrew store, but you could probably find it online. I put it on the rubber seal inside the faucet after I clean the faucet. The company that makes the grease still recommends not to use a lot at one time.

  • Brian May 2, 2017 @ 1:45pm

    This is because you have a rear sealing faucet. The air can get to the seal and “gum” up the seal if you don’t use it often enough. I had that issue until I switched to a front seal faucet like the Perlick Perl 630SS. Costs a little more, but it is WELL worth it. No more sticking if I don’t use it for days or weeks. Highly recommend it!!

  • dddcar March 31, 2018 @ 12:45pm

    Has anyone found a similar guide for a Guinness faucet? I took mine apart to clean and not exactly sure how to put it back together.

  • raymond April 13, 2018 @ 8:14pm

    where do You get the parts and are they standard with all tappers I have a versnel

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