The HOLDRITE® #117-CM 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 #117-3CM through #117-8X6CM retains the Combo or Wye with 1/8 bend onto the adjoining piping. All stainless steel must be bands must be torqued to 60 in/lbs minimum. When installed correctly, these restraint brackets achieve a safe thrust pressure rating equal to 50 ft head of water pressure.