How to Guide

115
• 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.
• Confirm compatibility of pipe marking adhesive tape
with the manufacturer of the tape to ensure chemical
compatibility with CPVC pipe and fittings.
• 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.
• Backfill 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.
• 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 fluid flow 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.
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.
SUPPLEMENTAL INFORMATION