Average Reviews:
(More customer reviews)The old National No. 7 canners last forever. This ring and the pressure relief valve are all that is needed every few years to keep them going. When you get the ring, oil it well with vegetable oil and do not be concerned that it seems too long at first. The repeated heating of the system causes the seal to shrink a bit. If it starts to not seal quite as well, take it out, oil it again and put it back in with the other side up.
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The sealing ring fits around the inside rim of the cover and forms a pressure-tight seal between the cover and the body of the pressure canner during canning and cooking. When installing a sealing ring, work it into the cover in four small sections, for example, top, bottom , left and right. Work it into the groove a small section at a time until it is fully in place. Place the cover on the cooker body. Put one hand on the top center of the cover and push down firmly. Open and close the cover several times. Fits Presto Pressure Canner models: 01/CA16A, 01/CA16H, 01/CA21A, 01/CA21H, 21, 21AV, 21B, 21S, 7, 7AV, 7B, 7S, CA16, CA16H, CA21, CA21H.
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