Note: only Presto and old All American canners with a non-removable petcock are considered dial gauge canners. All other canners, even if they have a dial, are considered a weighted gauge canner and the dial is used as a guide to the pressure and to show when the pressure drops to 0; their gauges do not need to be tested.
The following UC Cooperative Extension offices offer pressure canner gauge testing:
Amador County, UC Cooperative Extension, 12200B Airport Road, Jackson, CA 95642
(209) 223-6482
Calaveras County, UC Cooperative Extension, 891 Mountain Ranch Road, San Andreas, CA 95249; (209) 754-6477
El Dorado County, UC Cooperative Extension, 311 Fair Lane, Placerville, CA 95667; (530) 621-5502
Inyo County, UC Cooperative Extension, 207 West South Street
Bishop, CA 93514; (760) 873-7854
Modoc County, UC Cooperative Extension, 202 West 4th Street, Alturas, CA 96101; (530) 233-6400
Mariposa County, UC Cooperative Extension, 5009 Fairgrounds Road, Mariposa, CA 95338-9435; (209) 966-2417
Orange County, UC Cooperative Extension, 7601 Irvine Blvd, Irvine, CA 92618; (949) 653-1810
Sacramento County, UC Cooperative Extension, 4145 Branch Center Road, Sacramento, CA 95827-3823; (916) 875-6913
San Bernardino County, UC Cooperative Extension, 777 E. Rialto Ave, San Bernardino, CA 92415; (909) 387-2194
San Diego County, UC Cooperative Extension, 9335 Hazard Way, Suite 201, San Diego, CA 92123; (858) 822-7724
San Joaquin County, UC Cooperative Extension, 2101 E Earhart Ave, Stockton, CA 95206; (209) 953-6100
San Luis Obispo, UC Cooperative Extension, 2156 Sierra Way, Suite C, San Luis Obispo, CA 93401; (805) 781-5940
San Mateo County, UC Cooperative Extension, 80 Stone Pine Road, Suite 100, Half Moon Bay, CA 94019; (650) 726-9059
Shasta County, UC Cooperative Extension, 1851 Hartnell Avenue, Redding, CA 96002-2217; (530) 224-4900
Solano County, UC Cooperative Extension, 501 Texas Street, 1st Floor, Fairfield, CA 94533; (530) 666-8143
Sonoma County, UC Cooperative Extension, 133 Aviation Blvd, Suite 109, Santa Rosa, CA 95403; (707) 565-2621
Tulare County, UC Cooperative Extension, 4437-B S. Laspina St., Tulare, CA 93274; (559) 684-3300
Tuolumne County, UC Cooperative Extension, 2 South Green Street, Sonora, CA 95370; (209) 533-5695
Yolo County, UC Cooperative Extension, 70 Cottonwood Street, Woodland, CA 95695; (530) 666-8143