How to Guide

100
Plastics Technical Manual
INSTALLATION PROCEDURES
Exceeding recommended torque for threaded connections
may result in component damage, system failure and
property damage.
Installation of ABS, PVC and CPVC
Threaded Connections
Diameters 1 inch or Smaller
1. Make sure the threads are clean.
2. Charlotte Pipe recommends Teflon
®
tape thread sealant
for threaded connections 1-inch or smaller. Use a good
quality Teflon tape which has .4 minimum density, .003”
thick, .50% elongation and chemically inert. Wrap the
Teflon tape around the entire length of the threads; start
with two wraps at the end and wrap all threads overlapping
half the width of the tape. Wrap in the direction of the
threads on each wind.
3. Maximum wrench-tightness is two turns past finger tight.
Tighten with a strap wrench or similar tool. Do not use
common wrenches or tools designed for metallic pipe
systems.
Diameters 1-1/4 inch or Larger
1. Make sure the threads are clean.
2. Charlotte Pipe recommends paste type non-hardening
thread sealant for threaded connections 1-1/4 inch
or larger. All thread sealants must conform to the
requirements of IAPMO PS 36 and NSF Standard 61.
Chemical compatibility of joint compounds and thread
sealants with PVC, ABS and CPVC should be verified
with the thread sealant manufacturer.
3. Maximum wrench-tightness is two turns past finger tight.
Tighten with a strap wrench or similar tool. Do not use
common wrenches or tools designed for metallic pipe
systems.
NOTICE: All pipe thread sealants must conform to the
requirements of IAPMO PS 36 and with the thread sealant
manufacturer to confirm that these sealants are chemically
compatible with ABS, PVC and CPVC. Incompatible pipe
thread sealants may result in the degradation of plastic pipe
or fittings resulting in product failure and property damage.
All pipe thread sealants must conform to the requirements
of IAPMO’s PS 36 and with the thread sealant manufacturer
to confirm that these sealants are chemically compatible
with ABS, PVC, and CPVC. Incompatible pipe thread
sealants may result in the degradation of plastic pipe or
fittings resulting in product failure and property damage.
• Verify that paints, thread sealants, lubricants, plasticized
PVC products, foam insulations, caulks, leak detectors,
insecticides, termiticides, antifreeze solutions, pipe
sleeve, firestop materials or other materials are
chemically compatible with ABS, PVC or CPVC.
• Do not use edible oils such as Crisco
®
for lubricant.
• Read and follow chemical manufacturer’s literature
before using with piping materials.
• Confirm compatibility of pipe marking adhesive tape
with the manufacturer of the tape to ensure chemical
compatibility with CPVC pipe and fittings.