How many qt jars can be canned in this pressusre canner?

7 quarts jars. 10 regular mouth pints jars. I currently today have 20 pints of pork canning (i have an additional metal plate like the one that goes on the bottom ) 10 pints on the bottom and 10 on the top rack. You can not double stack quarts. This is the best canner I have owned

How many Quart and pint jars does it hold?

I would not put in more than 9 regular mouth pint jars per level, for a total of 18 jars. When you put in 10/level the jars get wedged in and there's a risk of jars cracking, based on my experience. I've been canning for 50+ years and am on my third 23-quart pressure canner just my opinion.

Can this canner be safely used on a glass-surface range? If so, what is the smallest burner on which it can be safely used?

The issue people have with using large vessels on glass top ranges is that if the vessel is larger than the burner ring, it could transfer heat past the area where the glass has been properly tempered for high heat (outside of the burner ring). This could cause a failure in the glass top surface. I would check with your range mfg as well as inly cook in a burner that is the same diameter as the vessel you're using.

how pressure is regulated

The pressure is actually regulated by a weight that sits on top of the vent pipe. The canner comes with a weight for 15 PSI, but Presto has weights for 5 & 10 PSI. You may also manually regulate the pressure by monitoring the gauge and controlling the heat under the pot.

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Description

⚡ Preserve like a pro, can with confidence!

DUAL USE VERSATILITY - Pressure canner doubles as a water canner for fruits, jams, and jellies—maximize your kitchen efficiency.
PRECISION PRESSURE GAUGE - Easy-to-read dial ensures USDA-recommended safe processing every time.
SAFETY FIRST LOCKING LID - Air vent and cover lock prevent accidents by only allowing pressure buildup when sealed.
MASSIVE 23 QUART CAPACITY - Perfect for batch canning and meal prepping, hold up to 24 half-pint jars with ease.
DURABLE LIGHTWEIGHT ALUMINUM - Robust yet lightweight design for effortless handling and long-lasting performance.

The PRESTO O1781 Canner is a 23-quart aluminum pressure canner designed for safe, USDA-approved processing of low-acid foods. Featuring a precise pressure gauge, secure locking lid, and compatibility with gas stovetops, it offers versatile use for canning vegetables, meats, fruits, and preserves. Lightweight yet durable, it includes a cooking rack and recipe book to elevate your home preservation game.

Specifications

Manufacturer	National Presto
Model Number	01781
Package Dimensions	36.8 x 36.8 x 35.6 cm
Material	Aluminum
Color	Silver
Volume	23 Quarts
Size	21.8 L
Wattage	1000 W
Special Features	Gas Stovetop Compatible
Voltage	100 Volts (AC)
Volume Capacity	23 クォート
Package Weight	5.6 Kilograms
Batteries Required	No
Batteries Included	No
Brand Name	Presto
Capacity	21.8 Liters
Country of Origin	China
Item Weight	5.44 kg

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