Reddit mentions of Gizzmo MWUG Ultra Skimmer Freeze Protection with Blowout Valve, 16- Inch

Sort answer Teflon Teflon Teflon on the threads. Gizmos can be used with teflon and do serve double function that way. Pool_Guy was getting at that issue. They plug the skimmer line as well as anything physically possible and protect against freeze expansion. They also make a special Gizmo of a special kind or different name. That has o-rings at the bottom threads. But also has a cap at the top which can be removed and can blow the skimmer out above the water level of the pool. So 1) Put in the Gizmo/ Gizmos. 2) Remover the caps. 3) Blow the skimmers out. 4) When skimmer line and Gizmo are COMPLETELY empty...and they can be. Replace the caps.http://www.amazon.com/Gizzmo-MWUG-Skimmer-Protection-Blowout/dp/B004VU8H5U. Also open all valves. When blowing out returns they can be done in order from closest to furthest. This will ensure the best blowout. The air is going to displace water and take the path of least resistance i.e. the bubbles are gonna be huge at closest return and lesser at furthest. Just plug them in order of closest to furthest. You will be doing the best possible way. Keep in mind on deep stuff water is also an insulator.