How to Guide

120
Plastics Technical Manual
SUPPLEMENTAL INFORMATION
brass transition or other metallic components to support
the weight of the metal system.
• Use check valves, heat traps or back flow preventers to
prevent cross-connections between hot and cold water lines.
• Flush the interior of heat exchangers or the exterior of
condenser coils thoroughly with mild ionic detergent solution
to remove incompatible oils prior to piping installation.
• Rinse with clean water to purge the system as a final
flushing.
• Verify that all boiler cleaning and sealing chemicals used
in the hydronic radiant heating system are compatible with
CPVC.
“DON’Ts” for all hydronic applications
• Do not exceed the operating temperature or operating
pressure of the piping system.
• Do not use CPVC male or female adapters with plastic
molded threads for FlowGuard Gold systems.
• Do not use the CPVC piping system to support any metallic
components.
• Do not use compression fittings for hydronic radiant
heating applications.
• Do not use solvent cement that exceeds its shelf life, has
become discolored or has gelled.
• Do not use CPVC tees or other CPVC components as hot
and cold mixing devices.
• Do not apply excessive solvent-cement to the joints.
Puddling of solvent cement must be avoided.
• Do not rely on an expansion tank to handle thermal
expansion of the piping system. Expansion tanks
accommodate expansion of the fluid, not longitudinal
expansion of the pipe. The piping system must be designed
to allow for thermal expansion.
FlowGuard Gold
®
Pressure Rating Chart (psi)
Pipe
Size 73°F 80°F 120°F 140°F 180°F
ALL 400 328 260 200 100
(SDR-11)
Corzan
®
Schedule 80 Pressure Rating Chart (psi)
Pipe
Size 73 ° F 80 ° F 120 ° F 140 ° F 180 ° F
2” 400 328 260 200 100
3” 370 303 241 185 93
4” 320 262 208 160 80
6” 280 230 182 140 70
8” 250 205 163 125 63
Do not exceed the maximum working pressure of any
system components including pipe, fittings, valves, molded
or cut threads, unions, mechanical coupling or flanges.
• The pressure rating of all components must be reduced at
temperatures above 73 degrees F. Refer to de-rating table
in this manual.
• Exceeding the maximum working temperature or
pressure of the system may result in system failure and
property damage.
Use of FlowGuard Gold
®
CTS CPVC all-plastic threaded
male adapters in hot water applications may result in
system failure and property damage.
• Use plastic threaded CTS CPVC male adapters in cold
water applications only.
• Use CTS CPVC x brass threaded transition fittings for hot
water applications.
• Do not use compression fittings with brass ferrules to
connect to CTS CPVC pipe or fittings where water
temperatures will exceed 140 degrees F.
• CPVC pipe can be used with standard brass ferrules to
make compression connections where the operating
temperature will not exceed 140°F. Apply Teflon (PTFE)
tape over the ferrule to allow for the dissimilar thermal
expansion and contraction characteristics of the metal
ferrule and the plastic pipe.
Failure to compensate for expansion and contraction
caused by temperature change may result in system
failure and property damage.
• Do not restrict expansion or contraction. Restraining
movement in piping systems is not recommended and
may result in joint or fitting failure.
• Use straps or clamps that allow for piping system
movement.
• Align all piping system components properly without
strain. Do not bend or pull pipe into position after being
solvent welded.
• Do not terminate a pipe run against a stationary object
(example: wall or floor joist).
• Do not install fittings under stress.
Prior to installing PVC or CPVC piping in hydronic
applications, it is important to flush the interior of the heat
exchangers and the exterior of the evaporator coils
thoroughly with a mild ionic detergent solution to remove
incompatible oils. Failing to do so could result in system
failure and property damage.
Verify that all boiler cleaning and sealing chemicals used in
hydronic radiant heating systems are compatible with PVC
or CPVC. Failure to do so could result in system failure and
property damage.
Equipment leaks in refrigeration or HVAC systems may
release POE oils or other contaminants into the piping
system. These oils and contaminants are incompatible with
PVC or CPVC and such exposure may result in pipe or
fitting failure regardless of flushing.