Winter Duck Bill Plug for 1.5" Threaded Fittings One Way Valve for Pools Spas
Allows your plumbing lines to be winterized without draining your pool!
- The patent-pending "duck-bill" valve allows a large flow of air and water to be blown from the return plumbing but does not allow water back into the lines
- Eliminates the need to drain water below returns
- Double seal system provides a water tight seal on all 1 1/2" threaded fittings
- Includes safety cap for ice protection
- Heavy duty rubber is resistant to anti-freeze and other pool chemicals