How to Guide

101
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:
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
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 - Pressure
Testing CPVC and PVC Piping
at Reduced Temperature
Joining Roll-Grooved Pipe
Roll-grooved PVC pipe is designed for use with conventional
gasketed mechanical couplings. It offers a method of
joining which is quick and convenient, and it can be used in
applications where frequent assembly and disassembly are
desirable.
Installation
1. Consult with the
manufacturer of
the couplings for
recommendations
on the coupling
style(s) designed
for use with PVC
pipe and the gasket
material which is
suitable for the
intended service.
2. Check the pipe ends for any damage, roll marks,
projections, or indentations on the outside surface between
the groove and the end of the pipe. This is the sealing area,
and it must be free of any defects.
3. Disassemble the coupling and remove the gasket. Inspect
for any damage and make sure the gasket material is
suitable for the intended service. Apply a thin coat of
silicone lubricant to the gasket tips and the outside of the
gasket.
4. Slide the gasket onto the end of one length of pipe so that
it is flush with the end. Align and bring the end of another
length of pipe together while sliding the gasket back over
this junction. The gasket should be centered between the
grooves and should not extend into the groove on either
length of pipe.
5. Place the coupling housings over the gasket. The housing
keys should engage into the grooves. Insert the bolts and
applythenuts.Tightento“ngertight.”
6. Using a wrench,
alternately tighten the
nuts to the coupling
manufacturer’s
specifications. Over
tightening is not
necessary, and uneven
tightening may cause
gasket pinching.
INSTALLATION PROCEDURES
• 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).