Installation Guide

Viega IM-PFMB 1007
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coiled tubing. If kinking or cutting
should occur, these sections must
be cut out and a coupling installed.
4. For the best results, connect the
distribution lines to fixtures and the
MANABLOC immediately upon
installation, and label the end-use
fixture on the MANABLOC cover
plate next to the port.
Self-adhesive labels are supplied with
the MANABLOC. Tubes pulled as a
bundle, or those not connected
immediately, should be marked at both
ends with a permanent marker
designating the fixture supplied.
5. Since plumbing fixtures are
generally located in groups, and
there may be several ViegaPEX
distribution lines running to
approximately the same location, it
is easiest to run these distribution
lines bundled together.
Hot and cold lines may be run in
the same bundle. For a neat
appearance, bundles can be tied
with nylon ties (Stock Code
HB14120 or HBPT) or plastic
strapping at regular intervals.
NOTE: Bundles shall be sufficiently
tied for tubing support but shall
NOT restrict tubing expansion and
contraction caused by temperature
variations.
CAUTION: DO NOT USE
DUCT TAPE FOR BUNDLING.
Duct tape will not permit
tubing movement.
6. INSTALLING DISTRIBUTION LINES
6.1 Installing Distribution
Lines
Distribution lines should be run
continuously in the most direct route
from the MANABLOC to the fixtures.
A distribution line may contain a
coupling or other fitting for purposes
such as repairing a damaged section
of tubing, handling a change of
direction which cannot be made
within the minimum bend radius
guidelines, accommodating a fixture
location change which requires a
longer line, or to supply a low-
demand accessory (i.e., ice maker).
However, several pieces of shorter
tubing should not be connected with
fittings for the purpose of using up
leftover lengths of tubing.
NOTE: It is the responsibility of the
installer to ensure that further
construction, finishing and other
mechanical system installations do
not compromise the MANABLOC
plumbing system as installed
according to these instructions.
1. The tubing coils are usually placed
at the MANABLOC location and
tubing is pulled to the fixture
through stud cavities, holes drilled
overhead in floor joists, etc. Several
tubes may be pulled at one time.
Viega’s color coded ViegaPEX
tubing will help prevent cross-
connections.
2. Tubing should not be pulled tightly
and some slack (typically, 7" per
50') is necessary to accommodate
expansion and contraction. Leave
enough excess tubing at the
beginning and end of runs to make
connections without putting strain
on the tubing.
3. Care should be exercised when
pulling PEX tubing to prevent
cutting or abrading. Care also must
be taken to prevent kinking of the
6. Bundles may be supported with
hangers designed for larger
tubing sizes.
7. The HB14120 or HBPT can be
used to support PEX lines
directly from
wooden framing
members.
Other plastic cable
ties capable of
supporting the
weight of the tube
or bundle when
filled with water
can also be used.
8. Holes drilled
through studs, joists,
plates, headers, etc.
must be large enough
to accommodate tubing bundles
without binding, to allow free
movement. Several smaller holes
(accommodating a few lines each)
may be preferable to drilling a
bundle-size hole. In no case should
the hole size exceed building code
guidelines, as this could weaken
the structural support members.
For more detailed instructions, refer to
PureFlow Installation Guide, section 7.
6.2 Connecting Distribution
Lines to the MANABLOC
PEX Press, PEX Crimp, and
Compression connections are
available and included with the
MANABLOC, except Supply
connections which must be ordered
separately.
UNDER NO
CIRCUMSTANCES
shall any form of thread
sealant (Teflon® paste, pipe dope) be
used on the distribution line
connections. The carriers present in
these compounds can crack the
plastic port connections, resulting in
leaks and water damage.