Enter engineers and E Scow sailors Dave Navin and son, Kyle, along with Brian Porter. Together, they developed the patent-pending plug. “I had sketched one up, and Brian built a prototype,” says Dave. Realizing they were working on parallel paths, they teamed up and then got Kyle to do the CAD work. The result was a drain plug with a built-in check valve that uses a small, round ball. Says Dave, “When we first built it, we took a Dixie Cup, cut a hole in the bottom of it, and fit one of the plugs into the hole. It easily drained just a ¼” of water.” Brian has them in his E Scow and says, “It’s remarkable how much drier the boat stays now.” He says they also eliminate the increased pressure in airtight tanks that builds up on hot days.