After you have installed your posts and strainer assembly you bolt your Insul-Strainer to your end post and slide the Zappa Rail into it. Using a Shifting Spanner or 20mm Spanner crank the insul-strainer up until the Zappa Rail is straight and tight, if you do not have sufficient tension on the Zappa Rail it will sag and warp. The insul-strainer is a permanent fixture on your end post making maintenance simple and minimal, ensuring your Zappa Rail always looks great!
Helpful Tip: Zappa Rail is easier to install on a warmer day. We also recommend re-tensioning the rail on the first warm day after installation, to eliminate any warps or twists.