User Guide

Installing PureFlow Systems
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PG-PF 724998 0320 PureFlow System
Installation Details
PEX tubing and/or
fittings installed between
trays (exposed) shall be
wrapped with a minimum
thickness of ½" E84 rated
insulation. Refer to Viega
PureFlow listing on
www.qai.org
Hanger to end of tray
Pipe Labels
When pipe labels are required, it is
acceptable to place 󶈶exible, pressure-
sensitive stickers directly on Viega
PureFlow tubing and/or on jacketed
insulation that is installed over the tubing.
If label adhesion is an issue, zip ties can
be used to assure long-term placement.
Refer to local code for required pipe
labeling and placement.
Fitting to tray / between trays
Overlap detail with straps
Plenum installation
Tray strapping detail
Noise and Water Hammer
As with all plumbing materials under some
operating conditions, a water hammer
can occur in PEX plumbing systems.
The inherent 󶈶exibility of Viega PureFlow
PEX drastically reduces the magnitude of
pressure surges compared with metallic
plumbing materials. Damage to plumbing
components in a PEX system due to these
pressure surges is highly unlikely, although
noise can sometimes result. Fortunately,
there are solutions to minimize or eliminate
water hammer noise.