Dometic O-Ring S/T Pump Kit

The Dometic O-Ring S/T Pump Kit is an essential maintenance item for boaters and water sports enthusiasts who rely on Dometic's sanitation and water systems. Sold as a matched pair, these precision-engineered o-rings restore proper sealing in both S and T model pumps—the workhorses found on countless recreational and fishing vessels. Over time, wear on seals compromises system integrity, leading to leaks, reduced pressure, and potential water contamination. This replacement kit addresses that problem directly, ensuring your marine plumbing operates at peak efficiency.

These o-rings are engineered to fit pumps secured by eight screws connecting top and bottom housings—a design found across Dometic's established S and T pump lineup. The elastomer composition resists the corrosive effects of saltwater and freshwater environments while maintaining flexibility under temperature cycling common on the water. Installation is straightforward: unscrew the pump housing, replace the worn o-rings, and reassemble. The compact footprint (1 x 1 x 4 inches) and minimal weight (0.1 lbs) make this kit easy to stock aboard or keep in your tackle locker for field repairs.

This kit is ideal for boat owners performing routine maintenance or addressing a slow leak before it becomes a system failure at sea. Professional marine technicians and DIY boaters alike benefit from keeping a spare pair on hand—downtime on the water is costly, and preventive replacement takes minutes. Verify your pump model uses the eight-screw configuration before ordering to ensure compatibility with your Dometic system.