User Guide

Installing PureFlow Systems
36
PG-PF 724998 0320 PureFlow System
Removing PureFlow Connections
Should a mistake be made, simply cut out the
PureFlow 󶈵tting and replace with a new one.
Tubing Size
Maximum distance
from fitting to bend
⅜" PEX L = 6 inches
½" PEX L = 8 inches
¾" PEX L = 10 inches
1" PEX L = 12 inches
1¼" PEX L = 14 inches
1½" PEX L = 16 inches
2" PEX L = 18 inches
WARNING!
Do not reuse Viega PureFlow
󶈵ttings
Repairs
Sections of kinked tubing should be
repaired by cutting out the damaged
section and installing a repair coupling.
Inserting a coupling to repair
kinked tubing
To reduce damaging stress on Viega
PureFlow 󶈵ttings, bend supports or tubing
fasteners must be used to anchor all
bends made close to 󶈵ttings. Support
must be provided for tubing bends located
closer to 󶈵ttings than distance “L” in the
table below (also see the diagrams below
for typical installation examples). Since
FostaPEX will maintain its shape once
bent, supports may not be necessary.
However, support must be used at the “L”
distance while making the bend.
OD
Bend
Radius
R
Minimum bending
radius for Viega
PureFlow PEX
tubing
L
Using a bend
support near a
Viega PureFlow
connection to
reduce stress on
󶈵tting
L
Using a tubing
fastener near a
connection to
support bend and
reduce stress on
󶈵tting