All American 1941X Sterilizer Pressure Cooker

$849.99

Shipped by manufacturer.

Current processing times: 45 business days

Serious cultivation starts with reliable sterilization. The All American 1941X Sterilizer Pressure Cooker is a high-capacity, stovetop steam autoclave designed for mushroom growers, home laboratories, and other demanding indoor cultivation applications.

Unlike a standard pressure cooker, this 27.9-quart pressure sterilizer features a stopcock that helps prevent steam from escaping once operating pressure is reached. Retaining steam supports stable, consistent sterilization conditions—an essential step when preparing substrate, grain, culture media, and reusable lab supplies.

Its durable aluminum construction is built for repeated use, while the generous chamber accommodates larger batches than typical household pressure cookers. That means fewer cycles and a more efficient workflow for hobby cultivators, educators, and small-scale production environments.

The 1941X operates on a stovetop, making it a practical choice for growers who want professional-style sterilization without installing a dedicated autoclave. Follow the manufacturer’s instructions for compatible cookware, pressure settings, loading, cooling, and safe handling.

As with any pressure vessel, inspect the unit before use and never force the lid or open the cooker while pressurized. Proper sterilization technique, clean handling, and careful preparation work together to reduce contamination risk and support healthy cultures.

For dependable, repeatable batch processing, the All American 1941X Sterilizer Pressure Cooker is a foundational tool for advanced mushroom cultivation and indoor lab work.

How it works

Only a small amount of water is needed to create the dry steam. After achieving a minimum temperature of 250°F(121°C), and a pressure of 17psi, the dry steam penetrates the contents, making them sterile in 35 minutes and ready for immediate use. No wiping is necessary to remove chemical residue or moisture, and cutting edges are not dulled.

"Using An All American Pressure Sterilizer"

Using your sterilizer

Download operating instruction manual here.

Just a small amount of water is needed to create the dry steam for this sterilizer. After achieving a minimum temperature of 250°F(121°C), and a pressure of 17psi, the dry steam penetrates the contents, making them sterile in 35 minutes and ready for immediate use. No wiping down is necessary to remove chemical residue or moisture, and cutting edges are not dulled.

  • Always remember to operate your All American Sterilizer with (preferably distilled) water. Be sure to check the manual and adjust parameters for high altitudes.
  • Jars, bottles, slants, etc. must be loosely capped so the steam can vent. Tools can be sterilized wrapped in foil.
  • Start with the control valve open. While the unit heats up, allow steam to be released from the valve for 5 minutes, then close the valve. Pressure will start to build and when the pressure gauge reaches the green zone (17-18 psi), open the control valve again and let it vent for 3-5 minutes.
  • When pressure returns to the green zone (17-18 psi), start timing the cycle for 35 minutes. When the cycle is done, shut off the unit and vent from the control release valve again but do not open the lid until pressure gauge reads 0 psi.
Specifications

Capacity

41 1/2 quarts (liquid), 32 pint jars, 19 quart jars

Jar capacities are based on round regular mouth standard Mason jar sizes.

Sterilizer

Capacity - 27.9 Qt Inner Container Capacity (Liquid)
Overall Height - 19 inches
Bottom Height - 14 1/4 inches
Inside Diameter - 15 1/4 inches

Inner Container

Inside Depth - 10 1/2 inches
Inside Diameter - 14 inches
Circumference - 44 1/2 inches
Capacity - 28 Quarts
Made in the U.S.A.
1 Year Limited Manufacturer's Warranty
Underwriters Laboratories Listed

1941X Model Features:

  • Can be used on most heating elements and stovetops (except glass or ceramic)
  • Crafted of the finest hand cast aluminum that resists aging and corrosion
  • Stay-cool bakelite top handles and wing nuts
  • Removable aluminum inner container with rack
  • Portable, economical, reliable operation
  • Pressure gauge conforms to the pressure gauge standard ANSI B40-1-1980
  • Flexible metal exhaust tube
Warranty

All American provides a 1 Year Limited Manufacturer's Warranty. 

Cautions & considerations

⚠ BURN WARNING:

IMPROPER USE MAY RESULT IN SCALDING INJURY

Sterilizer operates under pressure. Read and understand operating instructions before use to prevent accidental injury.

  • Unit must be properly closed before operating to prevent possible injury.
  • Unit will become hot during use. Do not touch hot surfaces.
  • Always use caution when handling unit when it is hot.
  • Always closely supervise children and pets when sterilizer is in use.
  • Extreme caution must be used when moving the sterilizer containing hot liquids.
  • Do not use the sterilizer for other than its intended use.
  • Always check the pressure release devices for clogs before using your sterilizer.

⚠ WARNING:

POLYPROPYLENE MELTS ABOVE 25PSI AND 350°F

Plastic grow bags are designed to withstand high temperatures during sterilization. However prolonged direct contact with the base of an autoclave or pressure cooker can result in damage to bags.

  • Never leave bags unattended in an autoclave or pressure cooker. 
  • Keep bags away from the metal sides of your equipment to avoid damage. 
  • Any sudden change in pressure will cause bags to rupture or burst. 
  • Always allow autoclave or pressure cooker to cool down and depressurize before opening to remove bags.

Additional cautions & considerations:

  • Before each use make sure that your gauge reads zero.
  • NEVER loosen wing nuts until the steam pressure gauge reaches zero and have allowed remaining pressure to escape by opening the control valve in the vertical “open” position.
  • NEVER open the sterilizer until the unit has cooled and the internal pressure reads zero on the steam pressure gauge.
  • NEVER use this sterilizer for cooking or processing food.
  • NEVER run the unit without water. Doing so will damage the heating element.
  • NEVER move your sterilizer while it is pressurized.
  • Be sure to keep metal-to-metal seal lubricated.
  • To prevent lime and mineral buildup, use distilled or deionized water in sterilizer.
  • Do not subject your sterilizer to sudden extreme temperature changes, as this may cause expansion or contraction of the metal which can damage any aluminum device. Do not move sterilizer from a cold storage area directly onto a hot flame or element. Do not add cold water to a sterilizer which has been boiled dry and remains hot. Do not cool sterilizer by pouring cold water into or on the unit.
  • As in all clinical/laboratory settings, wear safety glasses when attending to your sterilizer.
Ordering & Shipping

Discount codes do not apply to All American products.

Free shipping only applies to the 48 contiguous U.S. states. It does not apply to Hawaii, Alaska or U.S. Territories.

This unit ships directly from the manufacturer. We provide an update once the unit ships - current processing times are listed at 45 business days. Most orders ship within 10 business days.

Frequently Asked Questions

We recommend absolute beginners start with our Spray & Grow Kits, which make growing mushrooms at home super easy.

We want you to have the best possible experience with every North Spore product and guarantee free replacements within 30 days of receipt for any damaged, contaminated, or unusable product.

Absolutely! Mushroom cultivation is a great activity to do with the whole family, whether you'd like to grow indoors or outdoors. If you're new to mushrooms, we recommend starting with a Spray & Grow Kit or a Plant & Grow Kit – both make it easy to grow fresh, organic mushrooms at home.

We are vertically integrated — from culture work all the way to spawn and substrate production — ensuring a quality end product. And our staff mycologists keep up to date on all best practices in our field. Additionally, we have a dedicated QAQC team that tests every batch of grain and substrate before it’s inoculated.

Cluster of brown-capped mushrooms with long, light-colored stems against a white background.

Your Trusted Source for Premium Mushroom Growing Supplies

Whether you’re growing mushrooms at home, in your garden, or at a commercial scale, we offer everything you need to cultivate success. We start with the highest-quality OMRI-listed ingredients, mix them in our state-of-the-art facility, and inoculate them in our custom-built lab, so you can rest easy knowing your product will yield the best results.

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