Installation Guide

98
Plastics Technical Manual
PVC threaded caps
to test a domestic
water system. In
this scenario a
steel pipe nipple is
connected to a newly
constructed domestic
water system and a
PVC threaded cap
is used to seal the
nipple as shown in
the photograph.
There are several problems with this application. First, the
InternationalandUniformPlumbingCodesdonotpermitthe
use of PVC 40 pipe and fittings to be used in domestic water
systems within the walls of a building so this application is not
code compliant and therefore excluded under the Charlotte
Pipe and Foundry limited warranty. Second, these parts are
producedtoconformtoASTMD2466andareproducedfor
pressure piping application and are not designed to be part of
a test apparatus for repeated and temporary installation for
the purpose of testing domestic water systems. If not installed
correctly and properly tightened system or property damage
couldresult.Forthisapplicationgalvanizedmalleableiron
threaded caps would be recommended.
Do’s and Don’ts For Threaded
Connections
Do’s
• Avoidfemaleplasticpipethreadswheneverpossible.
• UseplasticthreadedCTSCPVCmaleadaptersincold
water applications only.
• Make threaded connections on FlowGuard Gold CTS
CPVC systems using Charlotte low lead brass transition
fittings. These fittings are available in male, female and
drop ear ell configurations.
• OnlyjointothreadedcomponentsconformingtoANSI/
ASMEB1.20.1orASTMF1488.
• De-rate plastic threaded ttings an additional 50%
beyond the pressure rating for pipe and fittings.
• UseTeontapeforthreadsealant.
• Tightenthreadedconnectionsusingastrapwrenchonly.
• Tightenthreadedconnectionsa maximumoftwoturns
past finger tight.
• Makethreadedplasticttingconnectionsinconformance
toASTMF1498
Don’ts
• Usepneumatictoolsfortightening.
• Neverclampfemalebrassthreadedtransitionttingsin
a vise.
• Neverapplymorethanlightpressureonmalebrassor
CPVC threaded fittings when clamping in a vise.
• Nevertightenthreadedttingsusingcommonwrenches
or tools designed for metallic piping systems.
• Neverusepipejointcompounds,pastesorlubricantsto
seal threaded joints.
• Nevertightenthreadedconnectionsmorethantwoturns
past finger tight.
• NeveruseABS,PVCorCPVCthreadedcapsaspartof
an assembly to test a domestic water system.
Pipe or fittings may be damaged by contact with
products containing incompatible chemicals, resulting
in 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.
• Confirm compatibility of pipe marking adhesive tape
with the manufacturer of the tape to ensure chemical
compatibility with CPVC pipe and fittings.
Exceeding recommended torque for threaded
connections may result in component damage, system
failure, and property damage.
Never use thread sealant when installing a P-Trap or a
Trap adapter with a plastic or metallic nut. Use of thread
sealants could cause seal separation or cause damage to
the fitting through over-tightening.
Maximum wrench-tightness is two turns past finger
tight. Plastic or metal nuts should be tightened with a
strap wrench only. Never use common wrenches or tools
designed for metallic pipe systems.
INSTALLATION PROCEDURES