Push-In Drain Plug f/1-1/2 Thru-Hull DrainsThese push-in drain plugs are used to stop water flow through drains or overflows from baitwell or livewell. Also work well as plugs for sink drains and built in cooler drains.Plugs are a perfect compliment to T-H Marine overflow drain tubes.These pvc push-in drain plugs are injection molded of marine grade PVC for a long lifespan. Plugs feature a pull tab or pull ring for easy removal. They have double seal rings to assure positive sealing.