Sioux Chief 550-FP2 tube support shall be used where necessary to support 1/2" PEX tubing every time it exits the floor to connect to a plumbing fixture. Sleeve supports are zinc-plated and are manufactured from 18-gauge steel and shall be rust resistant. Fasteners shall be mounted to subfloor using all four holes provided. PEX tubing shall be inserted straight through support sleeve to provide rigid support as tubing penetrates and exits the floor.