Question: pressure cooker gasket
By: tbailey
Published: September 14, 2010

where can I purchase a gasket for a 
Heavy-Duty Pressure Cooker
(6.3-qt.)
by Tramontina

Answers:
Chris Paulk

Contact the manufacturer or try
appliancefactoryparts.com
There are a lot of guys on craigslist who part and piece out different pieces of equiptment- you can try craigslist or ebay for that.
Curt

It's believable to me and not surprising that a piece of kitchen equipment with NO NAME or any other identifying marks on it would have a faulty part.  You get what you pay for.
sean sullivan

I have always used T-Fal pressure cookers -- and not had to replace gaskets. Yes I do check on them to make sure they're not cracked or worn out.