SuperPro O-Ring 11-1/2″ x 11-7/8″ x 3/16″, O-413-9

The SuperPro O-413-9 is a replacement o-ring measuring 11-1/2 inches by 11-7/8 inches with a 3/16 inch cross section. That is a large diameter ring, the size used on tank and housing joints rather than on small plumbing fittings.

Check the size

Our source data for this item gives the part number and the dimensions but does not list the equipment it belongs to. Measure the ring you are taking out, or measure the groove, and compare it against these three numbers before ordering.

Fitting

Rings this size need the groove cleaned out properly first, since a single piece of grit or an old flake of rubber under the ring will hold the joint open. Lay the ring in evenly rather than stretching one part of it into place, and use a light film of silicone based lubricant to help it seat.