Steam Canner vs Water Bath Canner
Both are for high-acid foods like jams, pickles and tomatoes, and research now supports steam canning within limits.
Water bath canner
A water-bath canner submerges jars fully in boiling water. It is the traditional, versatile method, works for all high-acid recipes and processing times, and needs no special equipment beyond a deep pot and rack. It uses a lot of water and takes time to heat.
Steam canner
A steam canner uses a shallow reservoir to surround jars with steam. It heats faster, uses far less water, and is approved for high-acid foods when you follow a tested recipe within its time limits. It is not for low-acid foods.
Which to choose and the safety rule
Both are only for high-acid foods; low-acid foods still need a pressure canner. Choose a steam canner for speed and less water on shorter high-acid processes; choose water-bath for versatility and longer processing times. Always follow a tested recipe and adjust for altitude.
Frequently asked questions
Are steam canners safe?
Yes, for high-acid foods, when you follow a research-tested recipe within the canner’s time limits and adjust for altitude. They are not safe for low-acid foods, which need a pressure canner.
Can a steam canner replace a water bath canner?
For many high-acid recipes, yes, and it uses less water and heats faster. But water-bath canning handles longer processing times and is more versatile, so it remains the traditional default.