Average torque should be approximately 25 feet lbs.
NDS PVC IPS compression fittings are used in residential and commercial DWV Irrigation Pool and Schedule 40 pressure applications. 4 inch Compression Coupling. Compression cap should be drawn up hand tight to insure proper alignment and seating of gasket then tighten 3/4 to 1 turn with a flo spanner wrench or strap wrench. on 1/2 inch through 2 inch IPS and 35 feet lbs.