1.25" SCH10 Purge Plugs1. 25" SCH10 Purge Plugs Our own design, these purge plugs are great tool for purging manifold primaries and collectors. As most manifolds start and end with an elbow, we made sure our caps worked with both long and short radios elbows. Each plug features a thumb screw for locking the cap to the workpeice without any tools. Each kit comes with 4 plugs, allowing you to set up runners ready to weld without having to remove the plugs right away. Once the