Presto Pressure Cooker 409A Parts: Why 409A Isn’t Your Model Number
“409A” is not your Presto pressure cooker’s model number. Presto explains that 409A is a listing number issued by Underwriters Laboratories, and it appears on all Presto pressure cookers. Your real model number will be something other than 409A.
Find the true model or stock number, then look it up in Presto’s online Parts Lookup to get the right sealing ring, overpressure plug and pressure regulator.
- 409A is a safety listing number, not a model number.
- Presto does have a rare 4-quart model called A409 (A first), which is obsolete.
- Presto recommends replacing the sealing ring and overpressure plug at least every two years.
- Always replace the overpressure plug when you replace the sealing ring.
- Leaks between the cover and body are usually caused by a shrunken sealing ring.
What does 409A mean on a Presto pressure cooker?
On its page for the A409 model, Presto says: if the number on your cooker is 409A rather than A409, there is a good chance you have the wrong model number. It explains that 409A is a listing number issued by Underwriters Laboratories and appears on all Presto pressure cookers.
So searching for “Presto 409A parts” can lead you to the wrong parts. Instead, find your cooker’s actual model or stock number before ordering.
Is there a Presto A409?
Yes, but it is rare. Presto lists the A409 as a 4-quart pressure cooker that is now obsolete, and says service parts for it may still be ordered online. If your cooker really says A409, with the A first, use that model number in Presto’s Parts Lookup.
How to find your Presto model number
- Look beyond 409A. Ignore the 409A listing mark and look for another number stamped or printed on the cooker.
- Check the body and handles. Stovetop cookers often carry a stock or model number on the body or under the handle area.
- Check your manual or box. The instruction booklet and packaging list the model or stock number.
- Measure if unsure. Note the capacity (for example 4, 6 or 8 quarts) and whether it is aluminum or stainless steel. This helps Presto’s parts team identify it.
- Use Parts Lookup. Enter the number in Presto’s online part finder, or contact Presto with the details.
Presto pressure cooker parts you may need
| Part | What it does | When to replace |
|---|---|---|
| Sealing ring | Seals the cover so pressure can build | When hard, deformed, cracked, worn, pitted, or soft and sticky; at least every two years |
| Overpressure plug | Backup relief valve if the vent pipe blocks | Every time you replace the sealing ring, or sooner if hard or damaged |
| Air vent/cover lock gasket | Small rubber gasket on the air vent | When it shrinks or hardens |
| Pressure regulator | Sits on the vent pipe and controls pressure | If damaged, dropped or not rocking properly |
Presto’s manual states that the overpressure plug is a secondary pressure relief valve. When it becomes hard and inflexible, it loses its ability to work and should be replaced immediately.
Presto says that if the overpressure plug is ever forced out of the cover while cooking, call its Test Kitchen at 1-800-368-2194 and do not reuse the released plug.
Why is my Presto pressure cooker leaking?
Presto’s manual says leakage between the cover and body is usually caused by the sealing ring shrinking after long use. Replace the sealing ring, and replace the overpressure plug at the same time.
Also check that the ring is seated all the way around the cover rim, and that the vent pipe is clear. Wash the sealing ring in hot, soapy water after each use, removing it from the cover first.
Buying replacement parts
- Use the model number. Sealing rings are sized to the cover, so a ring for a 4-quart cooker will not fit a 6 or 8-quart one.
- Buy genuine parts when you can. Presto sells service parts through its website for many models.
- Replace parts as a set. Sealing ring and overpressure plug together, as Presto advises.
Shop Presto sealing rings on Amazon →
Frequently asked questions
What size sealing ring does a Presto 409A take?
409A is not a model number, so it cannot tell you the ring size. Find your real model number or the cooker’s capacity, then look it up in Presto’s Parts Lookup.
Is a Presto 409A a pressure canner?
The 409A listing mark appears on Presto pressure cookers. Check the real model number and manual to see whether your unit is a pressure cooker or a canner.
How often should I replace the Presto sealing ring?
At least every two years, Presto says, or sooner if it becomes hard, cracked, deformed, pitted, or soft and sticky.
Do I need to replace the overpressure plug too?
Yes. Presto advises replacing the overpressure plug every time you replace the sealing ring.
The bottom line
Don’t order parts by “409A”. It is a safety listing number found on all Presto pressure cookers. Find your true model number, use Presto’s Parts Lookup, and replace the sealing ring and overpressure plug together at least every two years.
- National Presto Industries, 4-quart Pressure Cooker, Stock No. A409 (explanation of the 409A listing number).
- National Presto Industries, Parts Lookup.
- National Presto Industries, Pressure Cooker Instructions (care, sealing ring and overpressure plug).
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