Install Instructions
Table Of Contents
- About this Document
- Disclaimers
- Product Information
- Viega Manifolds
- Viega PureFlow Tubing
- Viega PureFlow Fittings
- Viega PureFlow System Design Considerations
- Water Service Installation
- Installing the ManaBloc
- Mounting the ManaBloc
- Installing Manifold Distribution Lines
- Installing the Viega PureFlow PEX Tubing System
- Fastening the Viega PureFlow System
- Installing Viega PureFlow Fittings
- Pressure Testing Viega PureFlow Systems
- System Disinfection
- Installer Checklist
- Limited Warranty
Installer Checklist
84 of 88
IM-PF 724596 1021 PureFlow Water System (EN)
16 Installer Checklist
In the event there is a conict between the contents of this list or
any applicable code, the code or the instructions, whichever is more
restrictive, shall govern.
Tubing Markings
■ ASTM F876 Cross-linked polyethylene (PEX) tubing.
■ ASTM F877 Cross-linked polyethylene distribution systems
(connection listed with manufacturer-supplied tting and PEX tubing).
Fitting Markings
■ ASTM F877 Cross-linked polyethylene distribution systems
(connection listed with manufacturer-supplied tting and PEX tubing).
Joints and Connections
■ Tube end cuts shall be cut square and free of burrs.
■ Connection shall be assembled per manufacturer’s product instructions.
■ Incorrectly assembled ttings shall be cut out and replaced.
General Installation Recommendations
■ Contraction: allow ⅛" slack per foot of PEX tubing.
■ PEX may be loosely bundled (NOT TAPED).
■ Do not bend PEX tubing tighter than the manufacturer’s recommended
minimum bending radius.
■ Install minimum 18" of metallic or other approved material piping
between gas water heater and PEX tubing connections.
■ PEX must be free of gouges, cuts, deep scratches, tar, kinks, grease,
ux, and fading or discoloration.
■ Protective sleeves or bushings shall be used with metal studs.
■ Use clamps or straps at the required minimum “L” spacing between a
tubing bend and PEX connections.
■ Minimum horizontal support shall be per the table under "12.3
Supporting PureFlow PEX Tubing" on page 63.
■ Vertical tubing shall be supported at every oor and at the midpoint
between oors.
■ Supports/clamps shall not restrict the movement of PEX tubing.
■ Supports/clamps shall not pinch, cut, kink, or damage tubing.
■ Use only hangers and straps recommended for plastic tubing.
■ Tubing passing through slabs or foundations shall have a protective
sleeve.
■ Tubing shall be protected from nail damage.
■ Transition connections shall be made with ttings approved for that
purpose.
■ PEX shall be located at least 6" horizontally and 12" vertically from
sources of high heat.
Testing
■ Test pressure shall be at least equal to normal system working
pressure, but not less than 40 psi and not greater than 100 psi.
■ Test duration shall not be less than 15 minutes.
■ A slight drop in pressure after two hours is normal.