4' Thermal Tube Top
Same insulated protection – now in yellow! Permanently protect your vertical water supply line from freezing. Ritchie Thermal tubes provide two inches of insulation all around with an r-Factor of 7 per inch, 12 inch outside diameter, 8 inch inside diameter. Designed with the help for testing conducted by Iowa State University to determine the ultimate size for maximum water line protection. 4 foot overall height.