TH-Marine Push-In Drain Plug for 1-1/2" Thru-Hull Drains [PP-150-DP]Push In Drain Plug f 1 1 2" Thru Hull Drains These 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