You can save a bunch by buying homebrew keg o-rings in bulk.  Here are some part numbers, background and tips on keg gaskets along with some part numbers and sources for additional keg repair parts.

Silicone vs Buna-N

Silicone is softer than Buna-N.  Silicone also remains softer at cool temperatures.  Because of this, silicone is supposed to provide a better seal.

I use use Buna-N on my liquid posts because they are cheaper and I figure a leak is going to be very evident – Beer is… visible.  I use silicone on my gas posts because they seal better.  You cannot see leaking CO2, so I want these to seal as well as possible.  This also color codes posts for easy identification.  Black o-rings are liquid and orange o-rings are gas.

A Note on Gas O-rings I am quick to replace gas o-rings.  A leak at the post is particularly difficult to test for.  I have lost multiple tanks of CO2 before learning this lesson.  In bulk, these are cheap, replace them liberally.  My suggestion is every other keg.

Keg Dip Tube O-rings

As noted above, I recommend replacing your gas post o-rings frequently.  My suggestion is every other batch.

• Food Safe, Silicone – Keg Dip Tube O-Rings – Food Safe Silicone – *see note on food safety

Other Options – correct size, but not food grade

• Buna-N: 109 Buna-N O-Ring, 70A Durometer, Black, 5/16″ ID, 1/2″ OD, 3/32″ Width (Pack of 100)
• Silicone: 109 Silicone O-Ring, 70A Durometer, Red, 5/16″ ID, 1/2″ OD, 3/32″ Width (Pack of 100)

Keg Post O-Rings

As noted above, I recommend replacing your gas post o-rings frequently.  My suggestion is every other batch.

• Food Safe, Silicone – Keg Post O-Rings for Ball Lock Kegs – Food Safe Silicone – *see note on food safety

BLUE Food Safe, Silicone – Keg Post O-Rings – Food Safe Silicone – in BLUE – identical in function but available in custom blue.  The idea is to color code your keg posts for quick identification.  Blue = Beer.

 

 

GREEN Food Safe, Silicone – Keg Post O-Rings – Food Safe Silicone – in GREEN – identical in function but available in custom green.  The idea is to color code your keg posts for quick identification.  Green = Gas.

 

 

Other Options – correct size, but not food grade

• Buna-N: 111 Buna-N O-Ring, 70A Durometer, Black, 7/16″ ID, 5/8″ OD, 3/32″ Width (Pack of 100)
• Silicone: 111 Silicone O-Ring, 70A Durometer, Red, 7/16″ ID, 5/8″ OD, 3/32″ Width (Pack of 100) –  silicone probably work better for pin locks, see explanation below

Keg Lid O-Rings

• Food Safe, Silicone – Keg Lid O-Rings – Food Safe Silicone – *see note on food safety
• Food Safe, Buna-N – Keg Lid O-Rings – Food Safe Buna-N – *see note on food safety

Other Options – correct size, but not food grade

• Buna-N: 417 Buna-N O-Ring, 70A Durometer, Round, Black, 3-1/2″ ID, 4″ OD, 1/4″ Width (Pack of 10)
• Silicone: 417 O-Ring, Silicone, 70A Durometer, 3-1/2″ ID, 4″ OD, 1/4″ Width, Red (Pack of 5)
• Silicone: 417 Silicone O-Ring, 70A Durometer, Red (Pack of 5)
• Silicone: 5PCS/LOT Brand new Silicone Cornelius Type Keg Seal Replacement Kit o-ring rubber
• Soft Silicone: Brewery Gaskets 2-Pack O-Ring Gasket for Cornelius Home Brew Keg, Soft Silicone

Leaky Lid-Orings

William’s Brewing Oversize Keg Lid O-ring is slightly over-sized and made from a softer rubber.  It’s designed to help you achieve an airtight seal for leaky ball and pin lock keg lids.

Internal Ball Lock Quick Disconnect O-Rings

Dash 013 o-rings are not OEM internal ball lock QD gaskets, but in my experience they have fit in all the QDs that I’ve tried.  Your experience may vary.  Check out my post on the subject including some photos – See: CMBecker Ball Lock QDs + Replacement O-Rings

• Food Safe, Silicone – Internal QD Replacement O-Rings – Food Safe Silicone – *see note on food safety

Other Options – correct size, but not food grade

• Silicone: 013 Silicone O-Ring, 70A Durometer, Red, 7/16″ ID, 9/16″ OD, 1/16″ Width (Pack of 100)

If you’re looking for CM Becker OEM replacement parts, check out Keg Connection.  They have a nice diagram that shows all the parts and pieces – (gaskets, spring, stem and caps) for both ball lock and pin lock QDs.  See: Disconnect Parts List at Keg Connection

Ball Lock Keg O-Rings vs Pin Lock Keg O-Rings – are they the same?

Pin Lock Post O-Ring on Left, Ball Lock Post O-Ring on Right

Standard pin locks and ball locks use identical dip tube o-rings and lid o-rings

Post o-rings are a different story.  Standard pin lock keg post o-rings are slightly larger than ball lock keg post o-rings.

It may be difficult to see in these photos, but the left side shows a pin lock post with a ball lock o-ring installed on it.  The right side shows a pin lock post with the pin lock o-ring installed on it.  The pin lock o-ring extends out just a little bit further than the ball lock o-ring.  The ball lock o-ring is nearly flush the the lip on the post.  That small amount is the difference between the two o-rings.

I recommend stocking up on food grade spare o-rings.  This is especially true for post o-rings.  I recommend you change those liberally.  See: Why Won’t My Homebrew Carbonate? Fixing Beer Carbonation Problems – for more information on that.

Buying in bulk means you save money and you’ll have spares when you need them

Food Safe Replacement O-Rings – More Info

Related: What’s the Difference Between Ball Lock Kegs and Pin Lock Kegs

Universal Poppet O-Rings

Size Dash 008 fit all styles of Universal Poppet that I have tested.  Since universal poppets can vary slightly between manufacturers, I cannot guarantee they will work with your poppet.

• Food Safe, Silicone – Universal Poppet Replacement O-Rings – Food Safe Silicone – *see note on food safety

Other Options – correct size, but not food grade

• Buna-N: 008 Buna-N O-Ring, 70A Durometer, Black, 3/16″ ID, 5/16″ OD, 1/16″ Width (Pack of 100)
• Silicone: 008 Silicone O-Ring, 70A Durometer, Red, 3/16″ ID, 5/16″ OD, 1/16″ Width (Pack of 100)

I have read that Dash 006 fit some styles of Universal Poppets.  If 008 are too large, 006 may be something to try

006 Silicone O-Ring, 70A Durometer, Red, 1/8″ ID, 1/4″ OD, 1/16″ Width (Pack of 100)

Food Safe Materials for Keg O-Rings?

Most of the o-ring part numbers that are linked in this post are not specifically marketed for food use or as food safe.

In my experience, it’s extremely difficult to find offerings that claim to be safe for food contact.  Maybe some of the o-rings that are available are food safe, but very few are actually labeled as such.

But why?  One possible reason… they aren’t food safe.  Beyond that, one industry insider I spoke with said suppliers have a potential problem with fulfillment.  Since many options and materials are available, It’s difficult for some distributors or sellers to guarantee you’re getting a food safe option.

• Just because an o-ring is marketed for use in a keg doesn’t automatically mean that the materials and production processes used are food safe.
•  If you think about it from a random supplier or manufacturer’s perspective… they don’t know what you’re putting in your keg, maybe it’s not even food.  The problem that we, as homebrewers, have is is… beer is food and meant for human consumption.
• You cannot say all o-rings made from [fill in material here] are food safe.  Certain quality standards and processes are required.

There are some food safe options.  One notable supplier features all food safe o-ring offerings.

When I know that something is sold as food safe, I’ve labeled it as such in this reference.

Generally speaking, food safe o-rings may cost a little more, but, we’re, generally, only talking a few cents per o-ring.  It’s worth it.

If you’re using your keg for anything food related… My recommendation is to purchase o-rings made out of material safe for food contact.

Check each product page for specifications and application recommendations.  These can change.  Contact manufacturers with questions about suitability for a particular application.

Shelf Life and When Should I Replace My Keg O-Rings?

Depending on material, keg o-rings have a shelf life.  At some point, some materials may become brittle.  I can’t tell you exactly what that time frame is.  The best way to know is… are your o-rings brittle.  If so, they’ve reached their shelf life.  This is a good argument for buying smaller quantities more often.

When Should I Replace Keg O-Rings

Beyond shelf life, o-rings wear out from use – compression and abrasion.  Some people change o-rings every time they keg.  I think a good rule of thumb is yearly, for all except gas post and gas dip tube.  Because leaks on the gas post o-ring are difficult to detect, I suggest replacing these every other beer.  Gas dip tube o-ring leaks are easier to detect, but my recommendation is to change these every other beer along with the gas post o-ring.  A leak at either one of these points is invisible and has frustrating consequences… heading to your CO2 source to swap or fill a tank.  Better safe than sorry.

Special thanks to HBF Reader Tom his contributions to this section.  Tom is the person by brew-control brand items on Amazon

Other Keg and Kegerator Rebuild & Replacement Parts

Other Gasket Options

Quad-Seal Gaskets: These are OEM-style dip tube O-rings that seal more easily than standard options – this offering from Brew Hardware gets you a complete set of pin or ball lock o-rings including quad seal dip tube

Keg Repair Parts

• Universal Poppets – I use universal-type poppets exclusively when rebuilding kegs.  New offerings regularly become available – search Amazon for “universal poppet” – to compare offerings.  Tip: In my experience, universal poppets fit the vast majority of kegs without issue.  I have had a couple kegs that ended up being a bit too tight with these.  It’s an easy fix.  Use a pair of wire cutters or Nipper Pliers to trim the universal poppet.  I suggest taking off about half of a coil and testing.  You want the QD to slide on easily and for it to reliably hold pressure when the QD is off.  Taking off a half of a coil and testing helps you make sure you don’t end up making the poppet too loose.
• Keg Lid Feet – Bad or missing keg lid feet can cause keg lids to seal improperly – AIH – William’s Brewing – search Amazon for “keg lid feet” to compare additional offerings
• Keg Lid with Hang Tab – from William’s Brewing. includes an interior hang tab for hanging dry hop bags.  If you you need to replace keg lids – might as well get a hang tab
• Replacement Keg PRV Valves via AIH – also search Amazon for “keg lid PRV valve” – check compatibility with your keg
• Replacement Keg Lid (includes PRV) – ball lock style lid – also search Amazon for “homebrew keg lid” 
• Replacement Pin Lock Style Lid (no PRV) – TIp: If you’re replacing lids on pin lock kegs, I suggest using ball lock style lids.  Those generally include manual PRV valves that making venting your keg a whole lot easier.  Standard ball lock style keg lids fit on standard pin lock kegs.
• Pressure Relief Valve Ring – check compatibility with your keg
• Ball Lock QD Repair Kit – via Adventures in Homebrewing
• CM Becker Brand Pin and Ball Lock Quick Disconnect Repair Parts – Disconnect Parts List via Keg Connection
• Gas Dip Tube
• Liquid Dip Tube – Straight – for Firestone and Cornelius
• Curved Liquid Dip Tube
• Pin Lock Kegs require a special socket to remove the post {See: What’s the Difference Between Ball Lock Kegs and Pin Lock Kegs].  Those can be relatively pricey.  This eBay offering is the best everyday value I’m aware of for one of those sockets.
• Keg parts pages – finding compatible parts for PRV valves and post bodies can be tricky.  Here are parts landing pages for some of the homebrew shops I recommend – Adventures in Homebrewing, Austin Homebrew Supply, Brew Hardware, Keg Connection – huge selection of homebrew and commercial keg parts, MoreBeer, William’s Brewing
• Racetrack style kegs – standard kegs, both pin lock and ball lock are… standard.  Some parts on those are interchangeable – dip tubes, o-rings, universal poppets.  The big outlier are… racetrack style ball locks.  These perform the exact same function but some of the parts are not what I would call standard – the lids are more oval and the dip tubes and other parts are different.  As of this posting, Adventures in Homebrewing is the place to get hard to find racetrack keg parts.  These used to be very hard to find.  AIH has scooped up a lot of what was left and had other parts manufactured.  – Search racetrack at AIH

Faucet Repair Parts and Resources

• Perlick 630SS Front Seat O-Ring Replacement
• Perlick 600 Series Diagram and Repair Parts
• Perlick 525 Rebuild Kit 
• Perlick 525 Diagram and Repair Parts
• Standard Faucet Diagram and Repair Parts
• Stout Faucet Diagram and Repair Parts
• Seal Kits for Intertap Faucets and Seal Kit for Intertap Flow Control Faucets
• MoreBeer’s Intertap Faucet Parts Kit
• Hands on Review: Intertap Forward Sealing Faucets and Accessories!

If You’re Looking to Upgrade Your Kegerator…

In my opinion… Kegland’s DuoTight System deserves a hard look

Reviews!

We’ve got loads of Draft and Kegerator related reviews!  Check out the lineup…

Homebrew Reviews: Draft and Kegerator

Odds and Ends

• Kegland Flow Control Ball Lock Liquid QDs – at William’s Brewing & MoreBeer – These ball lock QDs are made from stainless steel.  Beyond that they also have a unique feature that allows you to change the resistance that the QD is exerting on your beer.  That means you can dial in flow right at the QD.  That allows you to make modifications for lower or higher carbonation levels without changing tubing lengths.
• Universal Cornelius Posts – via William’s Brewing – these posts work with both gas AND liquid QDs.  Make sure your keg threads are compatible
• Stainless Steel Adapter Plugs – Replaces ball lock or pin lock posts on compatible kegs.  Allow you to connect 1/4″ MFL or MPT fittings directly to a keg without using a QD.
• Gas QD with Integrated Check Valve – Prevents Beer Back-Feeding – Ball Lock – Pin Lock – keep beer from flowing the wrong way
• Inline Check Valves – MFL, Barbed
• Inline Regulator – allows you to control pressure on line by line basis – Review – Dial in w/Spunding – Use for portable serving!
• Threaded Ball Lock Posts – these NPT threaded ball lock posts allow you to add a ball lock post pretty much anywhere you want to – Liquid, Gas
• Low Profile Pin Lock QDs (5/8″ Shorter) – Liquid – Gas – Combo – these are great if you’re having clearance problems.
• Pin Lock Keg Depressurizer Tool – These help you easily vent pin lock kegs – since pin lock style lids don’t have a PRV
• Shank Parts Diagram
• Taprite PT101 Pony Pump Parts & Diagram

Stainless Steel Ball Lock Quick Disconnects

• Torpedo SS Ball Lock QDS at MoreBeer
• Adventures in Homebrewing offers a number of SS QD models – Keg Disconnects at AIH

Tools for Removing Keg Posts

• Keg Sockets – Choose Your Sockets – via Keg Connection – choose from ball lock and pin lock compatible sockets
• Search Amazon for “Pin Lock Socket”
• 11/16″ 6 point: CRAFTSMAN Deep Socket, SAE, 3/8-Inch Drive, 11/16-Inch, 6-Point (CMMT43336) – note that multiple variations of this product may be available, as such a different version may appear at this link
• 11/16″ 12 point: CRAFTSMAN Deep Socket, SAE, 1/2-Inch Drive, 11/16-Inch, 12-Point (CMMT47524) – note that multiple variations of this product may be available, as such a different version may appear at this link
• 7/8″ 12 point: CRAFTSMAN Deep Socket, SAE, 1/2-Inch Drive, 7/8-Inch, 12-Point (CMMT47528) – note that multiple variations of this product may be available, as such a different version may appear at this link
• Hands on Review: Craftsman Deep Well Sockets for Ball Lock Keg Posts
• Hands on Review: “Ball Lock Keg Wrench” – 11/16″+7/8″ Ratcheting Wrench – via Apollo Tools Wrench Set

O-Ring Sets

I recommend using food safe options, which as mentioned previously are tough to find.  Check each product page for complete description.

• Universal O-Ring Ten Gasket Sets for Home Brew Kegs With Silicone Post O-Rings
• Universal O-Ring Five Gasket Sets for Home Brew Kegs With Silicone Post O-Rings
• Ferroday 3 Pcs/lot Keg Seal Kit Silicone Keg Lid O Ring Replacement Gasket O-Ring Set For Cornelius/Corny Type Keg
• Universal Kegco type O-Ring Five Gasket Sets for Cornelius Home Brew Keg
• Universal Kegco Type O-Ring Ten Gasket Sets for Cornelius Home Brew Keg
• New offerings regularly become available… search Amazon for “keg oring set” to see what’s out there.

Also: Kegerator Tips & Gear | Keg Repair Part #s | Recent Keg Finds

Our Top Draft Resources

More: Our Last Fifty Finds!

Make sure the components you use are compatible and rated for your intended application.  Contact manufacturer with questions about suitability or a specific application.  Always read and follow manufacturer directions.  toppost:kegoringsandparts tag:tpr rs:0