Install Instructions

Fastening the Viega PureFlow System
68 of 88
IM-PF 724596 1021 PureFlow Water System (EN)
12.10.3 Corner Expansion O󶈴set
Where piping takes a corner after a long straight run, a simple 90° elbow
in the piping will allow for the absorption of expansion.
Calculate the necessary “L” dimension between elbow and nearest
fastener or use the chart below, which was 󶈵gured using the maximum
run for a single expansion compensator (50 feet).
Following the previous example:
L = C√OD x ∆L
Where:
C = 12
OD = 1.125 (1" PEX)
∆L = 2.64"
L = 12√1.125" x 2.64" = 20.7"
L = 20.7"
L
LT
∆L
Anchor point
Anchor point
Corner O󶈴set
Corner Expansion Example
L = 20.7"
Corner Expansion O󶈴set (L, inches)
per 50 linear feet of run
Tubing
ΔT(° F)
Tube
nom.
60 80 100 120 140 160 180 200
Viega
PureFlow
PEX
¾" 20.4 23.6 26.4 28.9 31.2 33.4 35.4 37.3
1" 23.2 26.7 29.9 32.8 35.4 37.8 40.1 42.3
1¼" 25.6 29.6 33.1 36.2 39.1 41.8 44.4 46.8
1½" 27.8 32.1 35.9 39.4 42.5 45.5 48.2 50.8
2" 31.8 36.8 41.1 45.0 48.6 52.0 55.1 58.1