How to Guide
111
SPECIAL CONSIDERATIONS
t 7JTVBMMZJOTQFDUBMMKPJOUTGPSQSPQFSDFNFOUJOH
t "MMPX GPS NPWFNFOU EVF UP UIFSNBM FYQBOTJPO BOE
contraction.
t 6TFQJQFTUSBQTUIBUGVMMZFODJSDMFUIFUVCF
t %SJMMIPMFT
1
⁄4 inch larger than the outside diameter of the
pipe or tube when penetrating wood studs.
t 6TFQSPUFDUJWFQJQFJTPMBUPSTUIBUBMMPXNPWFNFOUXIFO
penetrating steel studs.
t 6TFNFUBMMJDPSUFBSESPQIBOHFSTXIFOTVTQFOEJOHUVCF
from all thread rod.
t *GQJQFTMFFWFJTVTFEWFSJGZUIBUJUJTDIFNJDBMMZDPNQBUJCMF
with CPVC.
t *GQJQFTMFFWFJTVTFEFYUFOEJUJODIFTBCPWFBOECFMPX
the slab.
t #BDLmMMBOEDPWFSVOEFSHSPVOEQJQJOHQSJPSUPTQSBZJOH
termiticides in preparation for concrete pour.
t %FTJHOUIFTZTUFNOPUUPFYDFFEUIFNBYJNVNXPSLJOH
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
t %POPUUFTUXJUIBJSPSBOZDPNQSFTTFEHBT$PNQSFTTFE
air or gas testing may result in injury or death.
t %POPUVTFUPDPOWFZDPNQSFTTFEBJSPSBOZDPNQSFTTFE
gas. Conveying compressed air or gas may result in injury
or death.
t %POPUVTFTPMWFOUDFNFOUUIBUFYDFFETJUTTIFMGMJGFPSIBT
become discolored or gelled.
t %P OPU VTF TPMWFOU DFNFOU OFBS TPVSDFT PG IFBU PQFO
flame, or when smoking.
t %POPUIZESPTUBUJDBMMZUFTUVOUJMSFDPNNFOEFEDVSFUJNFT
are met.
t %POPUVTFEVMMPSCSPLFODVUUJOHUPPMCMBEFTXIFODVUUJOH
pipe. At low temperatures a wheel type pipe cutter
designed for plastic pipe is recommended.
t %POPUVTFQFUSPMFVNPSTPMWFOUCBTFEQBJOUTTFBMBOUT
lubricants, or firestop materials.
t %POPUVTFFEJCMFPJMTTVDIBT$SJTDPGPSMVCSJDBOU
t %POPUSFTUSJDUFYQBOTJPOPSDPOUSBDUJPO
t %POPUJOTUBMMJODPMEXFBUIFSXJUIPVUBMMPXJOHGPSUIFSNBM
expansion.
t %POPUVTFUVCFTUSBQTUIBUUFOEUPPWFSUJHIUFOPSSFTUSBJO
the system.
t %POPUVTFXPPEPSQMBTUJDXFEHFTUIBUSFTUSBJOUIFTZTUFN
t %POPUCFOE$17$UVCFUSBOTNJUUJOHNFDIBOJDBMTUSFTT
to a fitting. Do not install fittings under stress.
t %POPUUFSNJOBUFBQJQFSVOBHBJOTUBOJNNPWBCMFPCKFDU
(e.g. wall or floor joist).
t %POPUBMMPXIFBWZDPODFOUSBUJPOTPGUFSNJUJDJEFTUPDPNF
into direct and sustained contact with CPVC pipe.
t %POPUJOKFDUUFSNJUJDJEFTJOUPUIFBOOVMBSTQBDFCFUXFFO
pipe wall and sleeving material.
t %P OPU TQSBZ UFSNJUJDJEFT XIFO QSFQBSJOH UIF TMBC
without first backfilling over underground piping.
t %POPUFYDFFEBNBYJNVNnVJEnPXWFMPDJUZPGGFFUQFS
second for CPVC CTS and 5-feet per second for CPVC
Schedule 80.
t %P OPU FYDFFE UIF NBYJNVN QSFTTVSF SBUJOH PG QJQF
fittings, valves or flanges.
t %POPUVTFBOFYUFSOBMIFBUTPVSDFUPCFOE$17$
t %POPUFYDFFEUIFNBYPQFSBUJOHUFNQFSBUVSFPSQSFTTVSF
of any system components.
t %POPUDPOOFDU$54$17$PS4DIFEVMF$17$EJSFDUMZ
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.