Cheap Corny Keg Rebuild Parts

My friend Colin was recently lamenting the high cost of home brewing. One surprisingly high cost items are the replacement O-Rings for the Cornelius (Corny) kegs that many homebrewers use. One thing you can do to keep those costs in check is to buy in bulk. The following table has the McMaster Carr part numbers for the rebuild parts to fit ball-lock kegs. The prices per keg are roughly one third of what I have been paying in the local homebrew store or on eBay. For the largest O-Rings, the price is a bit less than half. For the smaller ones, I can get a pack of one hundred for less than the price of three individual O-Rings. These fit the ball-lock kegs. You pin-lock guys may need to do a bit more research.

Item	Description	Part #	Price
Dip Tube O-Ring	Buna-N 5/16" ID x 1/2"OD x 3/32"	9452K172	$2.21 per 100
Post O-Ring	Buna-N 7/16" ID x 5/8" OD x 3/32"	9452K23	$2.48 per 100
Lid O-Ring	Buna-N 3 1/2" ID x 4" OD x 1/4"	9452K218	$12.69 per 10

Since the prices are good, you might want to go with the "deluxe" option. I've noticed that the kegs don't originally have O-Rings on the dip tubes. There is another custom piece of rubber which is more like a tiny washer. These are the Quad Seal O-Rings, which are much closer to those "OEM" parts than the round profile O-Rings. Or you can go with Silicone O-Rings and get the Cadillac at McMaster-Carr for less than price of the Vee-Dub at your local hardware or homebrew store.

Item	Description	Part #	Price
Dip Tube Quad Ring	Buna-N 5/16" ID x 1/2"OD x 3/32"	90025K368	$ 7.61 per 100
Dip Tube O-Ring	Silicone 5/16" ID x 1/2"OD x 3/32"	9396K74	$ 9.91 per 100
Post O-Ring	Silicone 7/16" ID x 5/8" OD x 3/32"	9396K24	$11.48 per 100
Lid O-Ring	Silicone 3 1/2" ID x 4" OD x 1/4"	9396K926	$8.53 per 5