The HOLDRITE® #117-10X4 thru -15X12 (R or RG) Series NO-Hub Fittings Restraints are designed to reinforce no-hub cast iron installation in accordance with the installation instructions of U.S. Cast iron soil pipe manufacturers, CISPI Designation 310-11 and the 2006 CISPI installation Handbook. The #117-R Series kits retains the Short Reducer onto the adjoining piping. Pipe clams must be torqued to 60 ft/lbs. Minimum. When installed correctly, these restraint brackets achieve a safe thrust pressure rating equal to 50 ft head of water pressure for 10 in models and 40 ft for 12 to 15 in. Models ending in ''-G'' represent ''galvanized''.