User Guide

Installing PureFlow Systems
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PG-PF 724998 0320 PureFlow System
Installation Considerations
PEX Risers
Viega PureFlow tubing can be used as
a riser to supply multiple 󶈶oors with hot
and cold water. To help control thermal
expansion between multiple 󶈶oors, use
a midlevel guide at every 󶈶oor and riser
clamps at the following intervals:
Code approved 󶈶oor assemblyCode approved 󶈶oor assembly
CTS riser clampsCTS riser clamps
Midlevel guideMidlevel guide
Firestop penetrations Firestop penetrations
as required by code at as required by code at
each 󶈶ooreach 󶈶oor
Hot Lines
Use clamps above and below the 󶈶oor
every other 󶈶oor, with a single clamp
above the 󶈶oor in between.
Cold Lines
Use clamps above and below the 󶈶oor
every fourth 󶈶oor, with a single clamp
above each 󶈶oor between.
Support
There are a variety of clamps and
hangers to support PEX tubing risers
to support members or wall surfaces.
Always use products designed for use
with plastic tubing that have no sharp
edges or that can potentially 󶈶atten or
crush PEX tubing.
Viega o󶈴ers two types of multi clips
that will 󶈵t up to 2" PEX tubing. One is
designed to mount to a wall surface and
comes with a mounting screw. The other
type is designed to insert into a Uni-strut
support bar. Lock clips, tubing insulators,
and suspension clips are also available
for use with PEX tubing. Ring clamps,
clevis, or teardrop hangers shall have
a rubber or protective lining when used
with PEX tubing.
Installing PEX Under a Roadway
Viega PureFlow PEX tubing can be installed
under a roadway as long as it is buried
to the minimum frost level depth required
by local code and following proper direct
burial practices for plastic pipe.