Manual

Viega IM-PFMB 1007
14
COLD WEATHER CAUTION!
The thermoplastic
components of the
M
ANABLOC, like all thermoplastics,
have decreased resistance to impact
under freezing conditions and could
be damaged. Increased care must be
exercised when installation is to occur
under freezing conditions.
BEFORE INSTALLING THE
MANABLOC, MAKE SURE THE
LOCATION REQUIREMENTS HAVE
BEEN MET.
Extra caution should be taken in
handling the MANABLOC when
temperatures are below freezing.
Tubing penetrations may require
sleeving or the installation of an
insulator.
PEX tubing should always be
shielded from direct or
indirect sunlight.
PEX tubing shall be stored
under cover, shielded from
direct and indirect sunlight
when the material is stored
for any length of time. Short
exposure times, of ViegaPEX,
FostaPEX and PolyAlloy
fittings, not exceeding the
total accumulated
recommended exposure time
are permissible. See the
PureFlow
®
Water Systems
Installation Manual for more
information.
When the tubing penetrates at an
angle in relation to the hole, it may be
subject to a sharp edge, which could
d
amage the pipe. Acceptable sleeving
materials include flexible plastic
tubing, foam pipe insulation or an
approved plastic insulator.
It is not generally necessary to sleeve
PEX when penetrating wooden
framing members or non-metallic
finished or unfinished walls. However,
if there is a doubt, sleeve the pipe or
install an insulator.
Sleeve all penetrations of
metal, metal studs, and
masonry or concrete.
When penetrations must be sealed for
air infiltration purposes, there are
several options available. A good
grade of silicone, acrylic, or
siliconized acrylic caulking (DO NOT
use oil-base caulks), most of the
canned expanding foams,
and open- or closed-cell pipe
insulation are good sealing materials
and may be used in direct contact
with PEX tubing. Other materials may
be used provided they do not cause
short or long term damage to the PEX
tubing.
If there is no information available on
the compatibility of the proposed
sealing material, wrap the tubing with
several layers of aluminum foil in the
area of contact and extending a few
inches on both sides before applying
any sealing material.
Most building codes require the use
of a fire-stopping compound when
tubing penetrates a fire-rated wall.
There are a number of fire stopping
compounds readily available that have
been listed for use with PEX tubing.
These compounds come in standard
caulking tubes and are identified as
waterbased, acrylic or latex. Consult
the compound manufacturers’
instructions for proper application.
DO NOT APPLY CHEMICALS
TO THIS MANABLOC
PLUMBING SYSTEM