Float assembly 92 includes the brass valve and plastic float. Replaces Trion 92P.Valve and float arm are solid brass. Fits in a 7/16" Double-D hole. Plastic float measures 3½ x 2¼ x 1 inch. Length of float arm 4".Valve connects to ¼" copper tubing, the brass ferrule is included.The 707u or cb777 owners manual recommends 1 to 1½ inches of water depth.Instructions for installing the impeller with a 1/16" gap: Trion Impeller Installation (1 page, 70k pdf).