Place pinto beans in a large pot and cover with water by about 2 inches. Bring beans to a boil for two minutes,then remove from heat and let sit for one hour before draining.
Fill up your pressure canner with water according to the canner instructions and heat until softly boiling.
While your water is coming to a boil, wash jars and rings thoroughly. Put both aside until you are ready to use them.
One-by-one remove the jars and fill them with beans, leaving 1 inch of headspace. Add 1/2 tsp. salt per pint hot jar (1 tsp. if you are filling quarts), if desired.
Once all of your jars are filled, wiped, topped with lids and secured with rings, you are ready to fill your canner.