8
sooner if it becomes hard, deformed, cracked, worn, or pitted. Replace the sealing ring and overpressure plug at least every three
years. Failure to follow these instructions could result in bodily injury or property damage.
10. If the canner body or cover handles become loose, tighten them with a screwdriver.
11. If leakage of moisture or steam develops while using your canner, check the following possible causes:
♦ Theformationofasmallamountofmoistureunderthepressureregulatorisnormalwhencanningorcookingrstbegins.This
condensationisaresultofthetemperatureofthepressureregulatorbeinglowerthantherestofthecanner.Ifexcesscondensation
continues, the vent pipe may be loose and should be tightened with an adjustable wrench.
♦ Leakage between the cover and body is usually caused by shrinkage of the sealing ring after prolonged use. Replace the sealing
ring and overpressure plug.
♦ Aslightamountofleakagearoundtheairvent/coverlockisnormalwhencanningorcookingrstbegins.Ifleakagecontinues,
the cover handles may not be fully aligned with the body handles and, therefore, the cover lock cannot engage (see page 5, step
6).Cleantheairvent/coverlockoccasionallytoassurethatitoperatescorrectly(seepage7,step3).Replacethesmallgasketif
cracked or nicked.
♦ A small amount of steam or moisture may be visible around the overpressure plug when canning or cooking begins. This will stop
whentheoverpressureplugseals.Ifleakagecontinues,cleanorreplacetheoverpressureplug(seepage8,step5).
Do not operate your pressure canner with continual leakage. If the preceding steps do not correct the problem, return the entire unit
tothePrestoFactoryServiceDepartment(seepage33).
12. The dial gauge is a delicate instrument which must be handled with care. Do not submerse cover or let gauge come in contact with any
liquid.Thepressuredialgaugeneedstobecheckedforaccuracypriortoeachcanningseasonandifanyofthefollowingconditions
exist:coverhasbeensubmergedinwaterordropped,gaugeglassisbrokenorhasfallenout,partsarerusty,pointerisnotinthe
“0”block,orifyoubelievethegaugemaynotbeaccurate.Thegaugecanusuallybecheckedatyourlocalcountyextensionofce.
If you are unable to have your dial gauge checked locally, carefully remove the gauge and send it to the Presto Consumer Service
Department. See Service Information on page 32. An accurate gauge is necessary to help prevent food spoilage and possible food
poisoning.
13.Ifthepressurecannerbecomesdifculttoopenorclose,replacethesealingring.
14. IMPORTANT: The sealing ring, overpressure plug, and rubber gasket of the air vent/cover lock may shrink, become hard, deformed,
cracked,worn,orpittedwithnormaluse.Exposuretohighheat,suchasawarmburneroroventop,willcausethesepartstodeteriorate
rapidly. When this happens, replace the sealing ring, overpressure plug, and small rubber gasket of the air vent/cover lock. Replace
the sealing ring and overpressure plug at least every three years.
Before inserting a new sealing ring, clean the sealing ring groove with a brush.
Anymaintenancerequiredforthisproduct,otherthannormalhouseholdcareandcleaning,shouldbeperformedbythePrestoFactory
ServiceDepartment(seepage32).
PRESSURE CANNING FRUITS AND TOMATOES
Fruits and tomatoes may be processed using pressure canning or boiling water canning. The pressure processing method for fruits and
tomatoesgivesaheattreatmentequivalenttothemuchlongerprocessingtimerequiredwiththeboilingwatermethod.
Selectrm,fully-ripenedbutnotsoftfruitortomatoes.Donotcanoverripefoods.Somefruitstendtodarkenwhiletheyarebeingpre-
pared.Topreventthedarkening,placefruitinanascorbicacidsolution(1teaspoonascorbicacidto1gallonwater)oruseascorbicacid
orcitricacidmixturesaccordingtopackageinstructions.
Althoughfruithasbettercolor,shape,andavorwhenitiscannedwithsugar,itmaybecannedunsweetenedifdesired.Whitesugaris
preferable to brown sugar for canning. Light corn syrup or honey may be used to replace up to one-half the sugar.
The amount of sugar desirable to use in preparing syrups will depend upon the tartness of the fruit and on family preference. It should
be remembered that fruit, when heated, releases some of its juices which will dilute the syrup in proportion to the juiciness of the fruit.
SYRUPS FOR CANNING FRUITS
SUGAR PER YIELD OF
SYRUP QUART OF LIQUID SYRUP
VeryLight 1cup 4½ cups
Light 2 cups 5 cups
Medium 3cups 5½ cups
Heavy 4¾cups 6½cups