The HOLDRITE® #117-CM Series No-Hub Fitting Restraints are designed to reinforce no-hub cast iron installations in accordance with the installation instructions of U.S. cast iron soil pipe manufacturers, CISPI Designation 301-18, 310-18, 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 bands must be tightened to 60 in/lbs minimum. When installed correctly, these restraint brackets achieve a safe thrust pressure rating equal to 50' head of water pressure.