User Guide
Table Of Contents
- Introduction
- Codes, Standards, and Certifications
- PureFlow Press Fittings
- PureFlow Crimp Fittings
- PureFlow Tools
- Product Instructions
- Tubing Overview
- Design Considerations
- ManaBloc Systems
- Installing PureFlow Systems
- Storage Recommendations
- Handling Viega PureFlow PEX Tubing
- Removing PureFlow Connections
- Repairs
- Freezing
- Water Heaters
- Heaters, Flues, Vents, and Recessed Lights
- Fastening the PureFlow System
- Supporting PureFlow PEX Tubing
- Installation Considerations
- Noise and Water Hammer
- Shower Valves
- Electrical Grounding
- Expanding Foams
- Fire Stop Compounds
- Tubing Expansion
- Calculating Expansion Loops and Offsets
- Domestic Hot Water Circulating Systems
- Installing Viega PureFlow Fittings
- PureFlow PEX Tubing Installed in Slab
- Installing PEX Under a Slab
- Installing PEX Below Grade as Service Line
- Pressure Testing PureFlow Systems
- System Disinfection
- Limited Warranty
Installing PureFlow Systems
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PG-PF 724998 0320 PureFlow System
Z-Type Expansion Offset (inch) per 50 linear feet of run
Tubing
ΔT(°F)
Tube
nom.
60 80 100 120 140 160 180 200
L1 L2 L1 L2 L1 L2 L1 L2 L1 L2 L1 L2 L1 L2 L1 L2
Viega
PureFlow
PEX
¾" 10.2 5.1 11.8 5.9 13.2 6.6 14.4 7.2 15.6 7.8 16.7 8.3 17.7 8.8 18.6 9.3
1" 11.6 5.8 13.4 6.7 15.0 7.5 16.4 8.2 17.7 8.8 18.9 9.5 20.1 10.0 21.1 10.6
1¼" 12.8 6.4 14.8 7.4 16.5 8.3 18.1 9.1 19.6 9.8 20.9 10.5 22.2 11.1 23.4 11.7
1½" 13.9 7.0 16.1 8.0 18.0 9.0 19.7 9.8 21.3 10.6 22.7 11.4 24.1 12.1 25.4 12.7
2" 15.9 8.0 18.4 9.2 20.5 10.3 22.5 11.3 24.3 12.2 26.0 13.0 27.6 13.8 29.1 14.5
U-Type Expansion Offset (inch) per 50 linear feet of run
Tubing
ΔT(°F)
Tube
nom.
60 80 100 120 140 160 180 200
L3 L4 L3 L4 L3 L4 L3 L4 L3 L4 L3 L4 L3 L4 L3 L4
Viega
PureFlow
PEX
¾" 4.1 8.2 4.7 9.4 5.3 10.5 5.8 11.6 6.2 12.5 6.7 13.3 7.0 14.2 7.5 14.9
1" 4.6 9.3 5.3 10.7 6.0 12.0 6.6 13.1 7.1 14.2 7.6 15.1 8.0 16.0 8.5 16.9
1¼" 5.1 10.2 5.9 11.8 6.6 13.2 7.2 14.5 7.8 15.6 8.4 16.7 8.9 17.7 9.4 18.7
1½" 5.6 11.1 6.4 12.9 7.2 14.4 7.9 15.7 8.5 17.0 9.1 18.2 9.6 19.3 10.2 20.3
2" 6.4 12.7 7.4 14.7 8.2 16.4 9.0 18.0 9.7 19.5 10.4 20.8 11.0 22.1 11.6 23.2
The fastener shown on the L3 leg may be required to provide additional support depending on how the expansion loop is installed (horizontal/vertical).