How to Guide

110
Plastics Technical Manual
SPECIAL CONSIDERATIONS
another in physical contact with it, without appreciable dis-
placement oftheparticlesofthebody.”Thisdenitionleads
to the commonlyused “K” factor, which refers to thermal
conductivity.Notethattheunitsare“Btuperhour”forone
squarefootofsurfaceand“onedegreeFahrenheitperinch”
of material thickness.
Material Btu/h-Sq.Ft.-°/in
CPVC 1.0
PVC 1.3
PEX 2.4
Steel 312.0
Cast Iron 360.0
Copper 2,616.0
Condensation and Sweating
Due to its low coefficient of thermal conductivity, it is often not
necessary to insulate FlowGuard Gold CPVC against condensa-
tion within conditioned buildings. Two conditions that control
sweating of a pipe are (1) the pipe surface temperature, which
depends on the temperature of the water inside the pipe and
(2) the relative humidity of the air around the pipe. Because
each of the factors can vary greatly, it is possible that condi-
tionsexistthatcancauseCPVCpipetosweat.Undermost
conditions that cause copper pipe to sweat and drip, FlowGuard
Gold pipe will remain free of condensation.
UV Exposure
PleaseseetheWeatheringsectionofthistechnicalmanualfor
completeinformationonUVExposure.
Water Hammer Arrestors
Quick closing valves, actuated valves, starting or stopping
pumps or rapid increases or decreases in system flow rate
canresultinpressuresurgeor“waterhammer”capableof
damaging PVC or CPVC piping systems. Systems should be
designed by the engineer of record and in conformance to local
code requirements to manage the effects of pressure surge. In
applications where severe or repeated water hammer is encoun-
tered, especially at elevated temperatures or in a commercial
laundry or commercial kitchen, the use of a water hammer
arrestor is advisable.
FlowGuard Gold
®
and Corzan
®
Domestic Water Systems
Do’s and Don’ts
While not a complete list, the following is intended to
highlight many of the Do’s and Don’ts when installing a
FlowGuardGoldandCorzandomesticwatersystem.
Do’s
• Do install CPVC Schedule 80 domestic water systems
using IPS P-70 or Oatey Industrial Grade primers.
• Do install CPVC Schedule 80 domestic water systems
usingIPS714orOateyCPVCHeavyDutyOrangesolvent
cements.
• Installationshouldbeinaccordancewithnormalindustry
standards, good plumbing practices, applicable plumbing
codes, building codes and other regulations.
• Followrecommendedsafeworkpractices.
• Followpropermaterialhandlingprocedures.
• Keeppipeandttingsinoriginalpackaginguntilneeded.
• Cover pipe and ttings with opaque tarp when stored
outdoors.
• Makecertainthatthreadsealants,gasketlubricantsand
firestop materials are compatible with CPVC pipe and
fittings.
• Useonlylatexpaintifpaintingisdesired.
• Usetoolsdesignedforplasticpipeandttings.
• Cutpipesquare.
• Deburrandbevelpipebeforesolventcementing.
• Applyprimerandcementwithanapplicatorthatisone
halfthesizeofthepipe’sdiameter.
• Rotatepipe
1
⁄4 to
1
⁄2 turn as the pipe is being inserted into
the fitting socket.
• Avoidpuddlingofsolventcementinttingorpipe.
• Follow recommended cure time for the required pipe
diameter and temperature.
• Align all piping system components properly without
strain. Do not bend or pull pipe into position after being
solvent welded.
• Filllinesslowlyandbleedalltrappedairfromthesystem
prior to conducting a hydrostatic test.