🔒 Presto 0 Pressure Cooker Sealing Ring & Automatic Air Vent Bundle (3 & 4 Quart) - Enhanced for Improved SEO Review

First impression was that it was too big and didn't fit but on digging in I noticed the gasket goes into the rail and if you work carefully it slips and fits my vintage Sears 21 perfectly. pressure quarts

O-ring looks good and seems to fit, but I have not attempted to install it as the packaging (box) was missing the auto vent. I order an o-ring with a vent which costs a little more than one without and since we inherited a cannery and had no idea when the o-ring or vent was replaced we wanted to replace both. We have been deceived. an automatic vent which is an important part of this purchase.

Takes patience but it fits. We're trying to run my grandmother's autoclave from the 1950's. Pleased with possible spare parts. At first glance, the ring seems too big. But you just keep sticking it in the slot, always going around the lid. Lots of twists, but just keep pushing and pushing across the lid. Great excitement in the family when he finally got up. We haven't done a test run yet, but we really hope it will be like new. I had to swap a few more.

It really fits. There is a simple trick for the installation. Old seals shrink over time and are therefore smaller than new ones. (Shrinkage is one reason they need to be replaced when they wear out.) My old autoclave's model number is Presto 21B or CA21. At first the seal looked an inch too big. I had just pulled out an old filling so I knew exactly where to put it. However, it is not typed like the old one. It seems it can't fit in any way, but it really will go in. Here's how to do it…