Use and Care Guide

36
Cast Iron Installation
other suitable method, to prevent movement or joint
separation.
A heavy duty hubless coupling should only be used when a
more rigid joint is needed. Heavy duty couplings provide
additional sealing clamps. However, heavy duty couplings
are not a substitute for proper thrust restraints. The
dimensions specified in ASTM C 1540 result in couplings
that extend beyond the “W” dimension of the hubless
pipe fittings in 1-1/2” through 6” diameters. Therefore,
ASTM C 1540 (heavy duty) couplings will extend beyond
the gasket positioning lug and may also cover raised
lettering on some fittings.
Both regular and heavy duty couplings are to be installed
using a torque wrench. Regular hubless couplings are
typically tightened with a preset torque wrench set to
60-inch pounds, while heavy duty couplings are typically
tightened with a preset torque wrench set to 80-inch
pounds. The tightening sequence is essential when
installing both regular and heavy duty couplings. Torque
settings and sequencing vary by coupling manufacturer.
Couplings must be installed per the requirements of the
coupling manufacturer.
Making Hubless Joints
3. Insert the other component being joined into the other
side of the neoprene sealing sleeve, firmly seating
the pipe or fitting end against the integrally-molded
stop inside the sleeve.
1. Lay out components as shown.
2. Place the neoprene sleeve on the end of the pipe or
fitting, firmly seating the pipe or fitting end against
the integrally-molded stop inside the sleeve. Place
the stainless steel shield on the other component.
Note: If you are working with a fitting, make sure
the neoprene sealing sleeve makes contact with its
positioning lug.
4. Slide the clamp assembly into position over the
neoprene sleeve. Use the following procedures to tighten
to manufacturer’s recommended torque requirements
using a properly calibrated torque wrench:
INSTALLATION PROCEDURES
FOR CAST IRON
Failure to follow proper installation practices,
procedures, or techniques may result in personal injury,
system failure or property damage.
• Always use protective equipment including eye
protection and safety clothing while installing or cutting
pipe.
• Power equipment can be dangerous if used improperly.
Always review and carefully follow the manufacturer’s
operating and safety instructions.
Hubless couplings are not rated for pressure.