PEX Installation Manual

ManualsBrandsViega ManualsHeatingPEX Press Adapter - 1/2" Press x SVC - Bronze

Table Of Contents

1 Introduction
- 1.1 Viega PEX solutions
- 1.2 Viega PEX system concepts
2 Codes, Standards and Certifications
- 2.1 Codes
- 2.2 Standards
- 2.3 Certifications
- 2.4 Specifying Viega PEX Systems
3 Viega PEX Installation Methods
- 3.1 Home run systems
- 3.2 Combination systems
- 3.3 Branch and tee
4 Viega Manifolds
- 4.1 Viega manifold markings
5 Viega PEX Press Fittings
- 5.1 Viega PEX Press bronze
- 5.2 Viega PEX Press polymer
  - 5.2.1 Viega Smart Connect feature
- 5.3 Viega PEX Press fitting markings
- 5.4 PEX Press tools
  - 5.4.1 PEX Press hand tools
  - 5.4.2 PEX Press power tools
- 5.5 Making a Viega PEX Press connection with hand tool
6 Viega PEX Crimp Fittings
- 6.1 Viega PEX Crimp Eco Brass fittings
- 6.2 Viega PEX Crimp PolyAlloy fittings
- 6.3 Viega PEX Crimp fitting markings
- 6.4 The Viega PEX Crimp hand tools
- 6.5 Making a Viega PEX Crimp connection
7 ViegaPEX Ultra Tubing
- 7.1 ViegaPEX Ultra properties and performance
- 7.2 Tubing markings
8 Viega FostaPEX Tubing
- 8.1 FostaPEX properties and performance
- 8.2 Tubing markings
9 Viega PEX System Design and Sizing
- 9.1 ManaBloc
  - 9.1.1 Supply and distribution line sizing
  - 9.1.2 Plumbing code compliance (home run / parallel systems)
- 9.2 Combination systems
- 9.3 Branch-and-tee systems
10 System Sizing and Calculations
- 10.1 General
- 10.2 Viega PEX fittings
  - 10.2.1 Viega PEX Press friction loss — equivalent feet of SDR9 PEX tubing
  - 10.2.2 Viega PEX Crimp friction loss — equivalent feet of SDR9 PEX tubing
- 10.3 ViegaPEX Ultra tubing
11 Water Service Installation
- 11.1 Below grade and service line
- 11.2 Foundation penetration
- 11.3 Direct burial of Viega PEX fittings
- 11.4 Concrete
- 11.5 Installing under the slab
- 11.6 Protecting ViegaPEX Ultra tubing
12 Installing the ManaBloc
- 12.1 Overview and carton contents
- 12.2 Location
- 12.3 Draining the ManaBloc unit
- 12.4 Draining the ManaBloc system
- 12.5 Multiple ManaBloc installations
13 Mounting the ManaBloc
- 13.1 Mounting the ManaBloc between studs
- 13.2 Mounting the ManaBloc between studs without use of mounting straps
- 13.3 Mounting the ManaBloc - surface mount
- 13.4 Mounting the MiniBloc
- 13.5 Mounting Viega PEX Press and PEX Crimp Polymer manifolds
14 Installing Manifold Distribution Lines
- 14.1 Installing manifold distribution lines
- 14.2 Valve operation
- 14.3 Connecting distribution lines to the ManaBloc
  - 14.3.1 Port connections
- 14.4 Connecting distribution lines to fixtures
- 14.5 Water supply connections
15 Installing the ViegaPEX Ultra Tubing System
- 15.1 Handling ViegaPEX Ultra tubing
- 15.2 Uncoiling ViegaPEX Ultra tubing
- 15.3 Bending ViegaPEX Ultra tubing
- 15.4 Removing Viega PEX connections
- 15.5 Repairs
- 15.6 Freezing
- 15.7 Water heaters
- 15.8 Heaters, flues, vents and recessed lights
16 Fastening the Viega PEX System
- 16.1 Wood frame construction
- 16.2 Steel construction
- 16.3 Supporting ViegaPEX Ultra tubing
- 16.4 Noise and water hammer in PEX systems
- 16.5 Shower valves
- 16.6 Electrical grounding
- 16.7 Expanding foams
- 16.8 Fire Stop compounds
- 16.9 Tubing expansion
  - 16.9.1 Calculating expansion loops and offsets
- 16.10 Domestic hot water circulating systems
17 Installing Viega PEX Fittings
- 17.1 Stub out options
- 17.2 Copper connections
  - 17.2.1 Soldering Zero Lead alloy PEX fittings
- 17.3 Threaded connections
- 17.4 Valves
18 Pressure Testing Viega PEX Systems
- 18.1 General
- 18.2 Air testing
- 18.3 Leak detection
19 System Disinfection
- 19.1 General
- 19.2 California flushing requirements
20 Warranty

IM-PF 724596 0416

Domestic Hot Water Circulating Loop Supplying Two ManaBlocs

Hot

Cold

Cold Supply

Hot Water Supply

Water Heater

Check Valves

Hot Return

End Cap

Hot Water Supply

Cold Water Supply

Circ

Pump

12.4 Draining the ManaBloc system

Loosen and remove all of the supply line

connections (or caps) and all of the distribution

lines from the ManaBloc.

2. Remove the four attachment screws and

withdraw the ManaBloc unit from its mounting.

Note: Grasp the unit firmly before removing the

last attachment screw to prevent the unit from

falling and being damaged.

3. Completely drain the ManaBloc unit by

inverting the unit several times until there

is no water coming from any of the supply

connections or ports.

4. To purge the PEX distribution lines, first make

sure that both sides of all of the fixtures are in

the open position. Using low-pressure air from

a tank or compressor, force the water from the

lines by connecting the air pressure source to

each line one at a time and blow air through the

lines until no water flows from the fixtures.

5. Reattach the ManaBloc and reconnect the

supply and distribution line connections.

NOTE: When reconnecting the distribution lines,

DO NOT overtighten the connections. Compression

connections should require only about ⅛ turn past

hand-tight when reinstalling connections that were

previously tightened to the specications outlined

in this installation guide. PEX Press and PEX Crimp

connections must be only hand-tightened.

12.5 Multiple ManaBloc installations

If a home requires multiple ManaBlocs to service

the number of xtures in the home, these guidelines

should be followed if the ManaBlocs are closely

located to each other.

• Consider dividing high-demand xtures between

the units

• Consider a reasonable division, i.e. upstairs/

downstairs, east/west or front/back

Locating a remote ManaBloc

A remote ManaBloc is sometimes recommended

to achieve maximum efciency from your

ManaBloc system. It is advantageous when the

line lengths are excessive from one centralized

ManaBloc unit. When the home requires more than

one unit due to the number of xtures or size of

the home, consider locating a remote unit near an

outlying group of xtures.