User Guide

5
PG-PF 724998 0320 PureFlow System
Table of Contents
Calculating Expansion Loops and O󶈴sets _______________________ 46
Corner Expansion O󶈴set ________________________________ 46
Z-Type Expansion O󶈴set ________________________________ 46
U-Type Expansion O󶈴set ________________________________ 47
FostaPEX _____________________________________________ 47
Coiled Loop ___________________________________________ 47
Domestic Hot Water Circulating Systems _______________________ 49
Installing Viega PureFlow Fittings ______________________________ 50
Stub Out Options ______________________________________ 50
PureFlow PEX Tubing Installed in Slab __________________________ 51
Sleeving Requirements _________________________________ 51
Sealants ______________________________________________ 52
Heat Tape ____________________________________________ 52
Freeze Repair _________________________________________ 52
Condensation Control __________________________________ 52
Installing PEX Under a Slab ___________________________________ 52
Installing PEX Below Grade as Service Line _____________________ 53
Trace Wire ____________________________________________ 53
Pressure Testing PureFlow Systems _____________________________ 54
General ___________________________________________________ 54
Air Testing _________________________________________________ 55
Preparing for Air Pressure Test ___________________________ 55
Pressurizing the System ________________________________ 55
Completing the Air Test _________________________________ 56
Leak Detection _____________________________________________ 56
System Disinfection ____________________________________________ 57
General ___________________________________________________ 57
California Flushing Requirements ______________________________ 57
Limited Warranty _______________________________________________ 58
Viega PureFlow Water System ________________________________ 58