Pressure Canner Gauge Testing
Pressure canners with a dial gauge need to be tested annually to ensure accuracy. If your dial gauge is not accurate, it is not correctly reading pressure, which may result in under-processing (unsafe food) or over-processing.
Free Testing in Mariposa
The UCCE Master Food Preservers of Mariposa County offer free pressure gauge testing at our office. Usually, testing can be completed within a week.
How to Schedule:
Call or email us to set up a time to drop off your canner lid. We will notify you by phone when it has been tested and is ready for pickup.
Phone: 209-966-2417
Email: mrygiol@ucanr.edu
Does My Canner Need Testing?
Tip: Convert Your Presto Canner
You can easily convert your dial-gauge Presto pressure canner to a weighted gauge system by swapping out the standard deadweight for a 3-piece weighted regulator. This allows you to use the canner as a weighted gauge canner, meaning you won't need to worry about annual dial testing.