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
ManaBloc Systems
25
PG-PF 724998 0320 PureFlow System
ManaBloc Installation Overview
Carton Contents
Cold Port(s)
Hot Port(s)
Valve Key
Hot Water
Supply Inlet
Port Valve
Cold Port(s)
Plastic Mounting
Bracket
Cold Water
Supply Inlet
or Outlet
Cold Water
Supply Inlet
or Outlet
Internal Divider Plate
Typical 24-Port ManaBloc
Additional package contents include:
■ Valve T-Handle
■ Instruction Sheet/Drill Guide
■ Port Labels
ManaBloc Location
The ManaBloc is much like an electrical
breaker box. When a xture needs repair,
the line to that xture may be shut o at
the ManaBloc, eliminating the need to shut
down the water supply for the entire house.
This feature requires that the ManaBloc be
accessible after installation.
Before installing the ManaBloc, review
the following instructions.
BEFORE INSTALLING THE MANABLOC,
MAKE SURE THE FOLLOWING LOCATION
REQUIREMENTS HAVE BEEN MET.
COLD WEATHER CAUTION!
The thermoplastic components
of the ManaBloc, like
all thermoplastics, have
decreased resistance to impact
under freezing conditions and can be
damaged. Care must be exercised when
installation occurs in freezing conditions.
Take extra caution when handling the
ManaBloc in temperatures that are below
freezing. Tubing penetrations may require
sleeving or the installation of an insulator.
1. UNDER NO CIRCUMSTANCES
shall the ManaBloc be located in a
permanently covered area (behind
sheetrock, plywood, paneling)
or where freezing temperatures
may occur. Do not install in direct
sunlight. THE MANABLOC MUST BE
ACCESSIBLE and there shall be
sucient clear area in front of the
ManaBloc to provide access.
2. When local code allows, mount the
ManaBloc unit in a re-rated wall,
provided an access door is installed
over the access opening that meets the
same rating requirements as the wall.
3. When installing the ManaBloc in a
location other than between studs,
provisions must be made to support
the tubing runs as they exit the
ManaBloc (see “Bending PureFlow
PEX Tubing” on page 35).
4. Any installed cover panel shall allow
access to the ManaBloc and its
mounting screws, the port valves,
distribution line connections, and
supply line connections.
5. To maximize potential water and
energy savings, the ManaBloc should
be mounted as close as is practical
to the hot water source, taking the
following into consideration:
a. When the ManaBloc is mounted
above the water heater, there shall
be a minimum of 36" of connecting
tubing between the water heater
and the ManaBloc to reduce the
chance of heat stacking.
b. When the ManaBloc is mounted
beside the water heater and is
connected with tubing incorporating
a horizontal ow, there shall be at
least 18" of developed tube length.
Mounting the ManaBloc within eight
feet of developed tube length of the
water heater will minimize delivery
time of hot water to individual
xtures. The ManaBloc may be
mounted closer than 12" to the