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
57
PG-PF 724998 0320 PureFlow System
General
Local codes may require system
disinfection. When no other method is
available, follow the time limitations and
exposure levels shown below.
1. Use a chlorine solution and one of the
exposure durations listed below:
Concentration Period Authority
200 ppm 3 hours IPC/UPC
®
50 ppm 24 hours IPC/UPC
®
2. Mix the disinfection solution thoroughly
before adding it to the system.
3. The chlorine solution must reach all
parts of the system. Open all xtures
(both sides) and ow water until
a chlorine smell is present. As an
alternative, chlorine test tablets can be
used to detect chlorine at each xture.
4. The chlorine source for the solution
can be, but is not limited to, the
following:
Chlorine
Source
% Active
Chlorine
Form Amount per 100
Gallons Water for a
200 ppm Solution
Laundry
bleach
5.25 Liquid 3 pints (48 oz.)
5. After the solution has been in the
system for the time required by the
Authority Having Jurisdiction (AHJ)
or the exposure durations listed in
Step 1, the system shall be ushed
completely with potable water.
6. The system must be purged or
drained of all water or protected from
freezing.
FAILURE TO FLUSH THE
SYSTEM NOTICE!!
To prevent reduced service
life of system components, disinfection
solutions shall not be allowed to stand
in the system longer than 24 hours.
Thoroughly ush the system with potable
water after disinfection.
California Flushing Requirements
The State of California requires all
installations of PEX piping, where it is the
initial plumbing system installed in new
construction, shall be ushed twice over
a period of at least one week. The piping
system shall be rst ushed for at least
10 minutes and then lled and allowed
to stand for no less than one week, after
which all the branches of the piping
system must be ushed long enough
to fully empty the contained volume.
This shall not apply to installations of
PEX tubing where it replaces an existing
tubing system of any material.
At the time of ll, each xture shall have
a removable tag, shown below.
This new plumbing system was first filled and
flushed on
(date)
by
(name)
The State of California requires that the system
be flushed after standing at least one week after
the fill date specified above. If this system is used
earlier than one week after the fill date, the water
must be allowed to run for at least two minutes
prior to use for human consumption.
This tag may not be removed prior to the
completion of the required second flushing,
except by the building owner or occupant.
System Disinfection