How to Guide

111
SPECIAL CONSIDERATIONS
• Visuallyinspectalljointsforpropercementing.
• Allow for movement due to thermal expansion and
contraction.
• Usepipestrapsthatfullyencirclethetube.
• Drillholes
1
⁄4 inch larger than the outside diameter of the
pipe or tube when penetrating wood studs.
• Useprotectivepipeisolatorsthatallowmovementwhen
penetrating steel studs.
• Usemetallicorteardrophangerswhensuspendingtube
from all thread rod.
• Ifpipesleeveisused,verifythatitischemicallycompatible
with CPVC.
• Ifpipesleeveisused,extendit12inchesaboveandbelow
the slab.
• Backllandcoverundergroundpipingpriortospraying
termiticides in preparation for concrete pour.
• Designthesystemnottoexceedthemaximumworking
pressure of all system components including pipe, fittings,
valves, unions and flanges. De-rate the pressure rating of
all components if the working temperature will exceed 73
degrees Fahrenheit.
Don’ts
• Donottestwithairoranycompressedgas.Compressed
air or gas testing may result in injury or death.
• Donotusetoconveycompressedairoranycompressed
gas. Conveying compressed air or gas may result in injury
or death.
• Donotusesolventcementthatexceedsitsshelflifeorhas
become discolored or gelled.
• Do not use solvent cement near sources of heat, open
flame, or when smoking.
• Donothydrostaticallytestuntilrecommendedcuretimes
are met.
• Donotusedullorbrokencuttingtoolbladeswhencutting
pipe. At low temperatures a wheel type pipe cutter
designed for plastic pipe is recommended.
• Donotusepetroleumorsolventbasedpaints,sealants,
lubricants, or firestop materials.
• DonotuseedibleoilssuchasCriscoforlubricant.
• Donotrestrictexpansionorcontraction.
• Donotinstallincoldweatherwithoutallowingforthermal
expansion.
• Donotusetubestrapsthattendtoovertightenorrestrain
the system.
• Donotusewoodorplasticwedgesthatrestrainthesystem.
• DonotbendCPVCtubetransmittingmechanicalstress
to a fitting. Do not install fittings under stress.
• Donotterminateapiperunagainstanimmovableobject
(e.g. wall or floor joist).
• Donotallowheavyconcentrationsoftermiticidestocome
into direct and sustained contact with CPVC pipe.
• Donotinjecttermiticidesintotheannularspacebetween
pipe wall and sleeving material.
• Do not spray termiticides, when preparing the slab,
without first backfilling over underground piping.
• Donotexceedamaximumuidowvelocityof8-feetper
second for CPVC CTS and 5-feet per second for CPVC
Schedule 80.
• Do not exceed the maximum pressure rating of pipe,
fittings, valves or flanges.
• DonotuseanexternalheatsourcetobendCPVC.
• Donotexceedthemaxoperatingtemperatureorpressure
of any system components.
• DonotconnectCTSCPVCorSchedule80CPVCdirectly
to a boiler.
In understanding spray polyurethane foams, there are two
general areas of concern for CPVC pipe and fittings;
(1) chemical compatibility and (2) potential damage to
pipe and fittings due to high temperatures generated as a
result of the exothermic chemical reaction during the
installation and curing process. It is possible to apply
polyurethane foam insulation properly without damage to
CPVC pipe and fittings. However, the use of polyurethane
foam insulation in conjunction with CPVC has resulted in
the failure of CPVC pipe and fittings and property damage.
Therefore, Charlotte Pipe and Foundry does not
recommend the use of polyurethane spray on foam
insulation in conjunction with its CPVC pipe and fittings.