Install Instructions

Fastening the Viega PureFlow System
63 of 88
IM-PF 724596 1021 PureFlow Water System (EN)
12.3 Supporting PureFlow PEX Tubing
When running tubing, leave a small amount of slack between fasteners to
account for tubing contraction.
Note that Viega PureFlow PEX tubing will expand or contract 1.1" per
100' for every 10° F of temperature change. In long straight runs, allow
adequate clearance for this (see "Tubing Expansion" on page 66).
Tubing should be allowed freedom to move slightly as it expands. Do
not clip it tightly into place or locate it where it will be tightly constrained.
Use suspension clips or an approved plastic insulator where tubing
passes through studs or joists where abrasion and noise is a concern (see
illustrations to left).
Viega PureFlow PEX tubing must be fastened at a minimum interval noted
in the table below for vertical and horizontal support.
PEX Size Horizontal Vertical
Viega PureFlow
PEX
½" - 1" 32" O.C. Base of each
󶈶oor with midlevel
guide
1¼" - 2" 48" O.C.
PEX Support
In risers or vertical runs, Viega PureFlow PEX should be attached with
suspension clips or an approved plastic insulator at each 󶈶oor or ceiling
penetration, and every four feet in between.
Tubing supported with U-clip or lock clip
fasteners on horizontal runs
Spacing per
PEX Support
Table
Suspension clips support tubing in joist
penetrations or anywhere abrasion is a concern.
Suspension clip fasteners used at 󶈶oor plate
J-clamp or lock clip fasteners used to
support tubing in vertical runs between 󶈶oors
Midlevel
Guide
WARNING!
Some model codes may allow greater support spacing
intervals for plastic tubing. Always refer to local code for
approved spacing requirements that exceed the ones
referenced in this manual.
CAUTION!
Use only plastic or plastic-coated tubing supports. Metal
supports may damage tubing.