Installation Guide

6
PRODUCT INSTALLATION GUIDE
TRANSITIONS FROM CPVC
TO OTHER MATERIALS
Transition fittings are available for connecting to
other materials, valves and appurtenances and
must be used for all hot water line connections.
For cold water connections, male CPVC threaded
adapters may be used. They are not recommended
for hot water use as wide temperature
fluctuations can result in a drip leak.
TFE (Teflon) thread tape should always be
applied to the threads to improve the seal and
ease installation. If you prefer to use a paste or
pipe dope, always check with Bow regarding its
compatibility with CPVC. (Some paste-type
sealants contain solvents that may be damaging
to CPVC.) Their use can significantly reduce the
performance characteristics of CPVC system,
and result in failure.
*See Annex for lists
Care should be exercised to avoid over-torquing
when connecting plastic to metal. Generally, two
turns beyond finger tight is all that is required to
make up a plastic threaded connection.
COMPRESSION CONNECTIONS
UTILIZING BRASS FERRULES
ON CPVC PIPE
Standard compression fittings which utilize
brass ferrules can be used on CPVC, although we
recommend the use of an O-ring transition
(above). If a brass ferrule is used, teflon tape
must be applied over the ferrule to compensate
for the dissimilar thermal expansion rates of the
brass and CPVC that could possibly result in
a drip leak. Care should be exercised not to
over-torque the compression connection.
HANGERS AND SUPPORTS
Because CPVC pipe is rigid, it requires fewer
supports than flexible plastic systems. For
vertical runs, provide a support at each floor
level, plus a mid-story guide. For horizontal runs,
support at three foot intervals for diameters of
one inch and below and at four feet intervals for
larger sizes. Piping should not be anchored
tightly to supports, but rather secured with
smooth straps or hangers that allow for
movement caused by expansion and contraction.
Most hangers designed for metal pipe are
suitable for Bow FlowGuard Gold. Hangers
should not have rough or sharp edges which
come in contact with the pipe.