How to Guide

111
Freezing Points of Glycerin-Water Solutions
(weight %)
Glycerin by weight (%) Freeze Point °F (°C)
0 32.0 (0.0)
10 29.1 (-1.6)
20 23.4 (-4.8)
30 14.9 (-9.5)
40 4.3 (-15.4)
50 -9.4 (-23.0)
60 -30.5 (-34.7)
66.7 -51.7 (-46.5)
Greater than 66.7 Not Recommended
• Solutions greater than 50% propylene glycol are
incompatible with PVC and may cause damage to PVC
piping systems.
• Solutions greater than 25% propylene or 50% ethylene
are incompatible with CPVC and may cause damage to
CPVC piping systems.
• Ethylene glycol is compatible with PVC piping systems
up to 100% concentrations.
• 25% Propylene glycol solutions are approved for use
with potable water systems and provide freeze
protection to about 15°F (-10°C), 50% solutions provide
freeze protection to -30°F (-34°C).
• Please see the Chemical Resistance chart contained in
this manual for complete chemical resistance data.
• Ethylene glycol solutions are toxic and must therefore be
avoided in potable water and food processing systems.
25% ethylene glycol solutions provide freeze protection
to about 8°F (-13°C) and 50% solutions provide freeze
protection to about -33°F (-36°C).
ADDITIONAL CONSIDERATIONS
The installation tips, warnings and technical information in
this Additional Considerations section are intended to help
improve material selection and installation techniques. The
information found in this section enhances but does not re-
place the information found in other sections of this Technical
Manual.
Additional Considerations
• Antifreeze Solutions for Pressure PVC and CPVC Sys-
tems
• Antifreeze Solutions for ABS DWV Systems
• FlowGuard Gold
®
Domestic Water Systems
• Disinfection
• The Advantages of a FlowGuard Gold
®
CPVC System
• Chemical Compatibility with CPVC Products
• Low Temperature and Cold Weather Conditions
Antifreeze Solutions for
Pressure PVC and CPVC
Systems
Glycerin antifreeze solutions are recommended for use with
FlowGuard Gold
®
and Corzan
®
water distribution systems and
for PVC pressure and DWV applications.
Glycerin antifreeze should be diluted to the appropriate
concentration that provides adequate protection for the
intended application. Maximum freeze protection for glycerin-
water solutions is -51.7ºF (-46.5ºC) and occurs when the
weight percent of glycerin is 66.7%. The effectiveness of
a glycerin/water antifreeze solution diminishes above this
concentration. Freeze points of glycerin-water solutions follow:
Propylene glycol or ethylene glycol antifreeze solutions are
suitable for use in pressure testing PVC and CPVC pressure
and DWV piping systems as follows:
Antifreeze Solutions for ABS
DWV Systems
Only the following antifreeze may be used with or in conjunction
with ABS and ABS Plus
®
DWV foam core systems:
• 60% glycerol, by weight, in water. Use undiluted.
• 22% magnesium chloride, by weight, in water. Use
undiluted.
• “Plastic Pipe Antifreeze” (especially made for plastic
pipe).
Do not use any other type antifreeze except those recommended
above.
FlowGuard Gold
®
Domestic
Water Systems
FlowGuard Gold pipe and fittings are made from a special-
ty plastic known as chlorinated polyvinyl chloride (CPVC).
FlowGuard Gold CPVC is the result of new technology that
ensures product toughness year round. FlowGuard Gold wa-
ter distribution systems are assembled with readily available
tools. Solvent cement joints – proven with nearly 50 years of
successful service history – help assure the reliability of a
FlowGuard plumbing system.
FlowGuard Gold CPVC pipe and fittings are designed, manu-
factured and listed for domestic water applications. Piping
systems using CPVC should be installed by licensed plumbing
contractors in accordance with normal industry standards,
good plumbing practices and in compliance with applicable
plumbing codes, building codes and other regulations.