Seal Kit for Cornelius Type Kegs is a convenient replacement O-ring set for servicing compatible ball lock and pin lock Corny kegs. Keg seals can gradually flatten, harden, crack or become damaged through regular use, cleaning and repeated disassembly. Replacing these parts can help restore a dependable seal and reduce the risk of losing beverage or CO₂.

The kit includes one large hatch O-ring, two post O-rings and two dip tube O-rings. Together, these seals cover the main service points found on many Cornelius-style kegs.

Suitable for Ball Lock and Pin Lock Kegs

This replacement kit is designed for compatible:

• Ball lock Cornelius kegs
• Pin lock Cornelius kegs
• Corny-style homebrew kegs
• Refurbished soft drink kegs
• Stainless steel homebrew keg systems

Although many Cornelius-style kegs use similar seals, dimensions can vary between manufacturers and models. Compare the existing O-rings and keg components before installation.

Complete Five-Piece O-Ring Kit

The Seal Kit for Cornelius Type Kegs includes:

• One hatch or lid O-ring
• Two post O-rings
• Two dip tube O-rings

The hatch O-ring seals the removable keg lid against the opening in the stainless steel tank.

The two post O-rings seal the outside of the gas and liquid posts where the keg disconnects attach.

The dip tube O-rings fit beneath the gas and liquid posts, helping seal the dip tubes against the keg body.

Signs Your Keg Seals Need Replacing

Consider replacing the seals if you notice:

• CO₂ escaping around the keg lid
• Gas leaking from a post
• Beverage leaking around the liquid post
• Disconnects that no longer seal correctly
• O-rings that appear cracked or flattened
• Hard, brittle or stretched seals
• Difficulty maintaining keg pressure
• Unexplained loss of carbonation

A leak may be caused by more than one component, so inspect the lid, posts, poppets, pressure relief valve and disconnects as well.

Helps Prevent CO₂ Loss

Even a small leak can slowly empty a CO₂ cylinder.

Fresh seals can help maintain pressure around the:

• Keg hatch
• Gas post
• Liquid post
• Gas dip tube
• Beverage dip tube

After servicing, always pressure-test the keg before filling it with beer or another beverage.

General Installation Guide

Before replacing any seals:

1. Disconnect the gas supply.
2. Release all pressure from the keg.
3. Open the pressure relief valve where fitted.
4. Remove the keg lid.
5. Unscrew the gas and liquid posts using the correct tools.
6. Remove the dip tubes.
7. Take off the old O-rings.
8. Clean and inspect all components.
9. Fit the new seals in the correct positions.
10. Reassemble the keg.
11. Apply low regulated pressure.
12. Check every sealing point for leaks.

Take care not to mix up gas and liquid posts, poppets or dip tubes during servicing.

Fitting the Hatch O-Ring

Remove the old lid seal and clean the groove thoroughly.

Check the lid and keg opening for:

• Dried beverage residue
• Scratches
• Dents
• Corrosion
• Damage around the sealing surface

Fit the replacement hatch O-ring evenly around the lid. A small amount of food-grade keg lubricant may help the seal seat properly and reduce pinching.

The hatch O-ring supplied may be either white or black. Colour does not determine which keg connection type it fits.

Replacing the Post O-Rings

The two post O-rings fit around the outside of the keg posts.

To replace them:

1. Remove the old O-ring carefully.
2. Clean the post groove.
3. Inspect the post for sharp edges or damage.
4. Apply a small amount of suitable keg lubricant if required.
5. Roll the new seal into position without twisting it.
6. Check that it sits evenly.

Do not use sharp metal tools that could scratch the post or cut the new O-ring.

Replacing the Dip Tube O-Rings

Dip tube O-rings sit beneath the gas and liquid posts.

When servicing them:

• Remove the posts carefully
• Keep the gas and liquid components separated
• Clean the dip tube openings
• Inspect the dip tubes for damage
• Fit the new seals without stretching them excessively
• Reinstall the posts using the correct orientation

A damaged dip tube O-ring may allow pressure or beverage to leak around the post assembly.

Leak Testing After Installation

Once the keg has been reassembled:

1. Add a small amount of water or sanitiser if desired.
2. Fit the keg lid.
3. Apply low regulated CO₂ pressure.
4. Use a suitable leak-detection solution around the lid and posts.
5. Watch for bubbles.
6. Reseat or replace components if leaks continue.
7. Repeat the test before filling the keg.

Never use a flame to locate a gas leak.

Use Food-Grade Keg Lubricant

A light coating of compatible food-grade keg lubricant can help:

• Improve lid sealing
• Protect O-rings from tearing
• Make disconnects easier to fit
• Reduce seal pinching
• Extend service life

Use only a small amount. Excess lubricant can attract dirt and make cleaning more difficult.

Cleaning and Storage

Before installation, wash and sanitise the seals using products suitable for keg components.

Avoid:

• Abrasive cleaning
• Sharp tools
• Harsh solvents
• Excessive heat
• Chemicals that may damage rubber seals

Store unused O-rings in a clean, dry place away from direct sunlight and heat.

Important Notes

• Includes five replacement O-rings.
• Suitable for compatible ball lock and pin lock Cornelius-style kegs.
• Includes one hatch O-ring.
• Includes two post O-rings.
• Includes two dip tube O-rings.
• Hatch O-ring may be supplied in white or black.
• Keg, posts, poppets and lid are not included.
• Release all pressure before servicing.
• Confirm compatibility with your keg model.
• Leak-test the keg after installation.

Seal Kit for Cornelius Type Kegs is a useful maintenance item for homebrewers who want to keep their Corny kegs sealing reliably. Keeping a spare kit on hand can make it easier to repair leaks quickly and return a keg to service.