Winterizing and Test Plugs
![Winterizing and Test Plugs Image](/_uls/resources/Winter_Plug.jpg)
A winter plug is basically a cork shaped piece of rubber with a threaded eyeball fitting on top of it. It is primarily used on above-ground or in-ground swimming pools. Its main purpose is to prevent the water in your pool from running out when the pool's filter and plumbing systems are removed.