Install

COMFORTPRO SYSTEMS
8I50 N. LEHIGH AVE..
MORTON GROVE, IL 60053
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AquaHeat PEX Tubing
Loop Layout and Installation Instructions
Important Notes for PEX Installers:
 The amount of loops and lengths of tubing supplied for this project has been calculated
by ComforPro Systems. The design is as specified by the consulting engineer, and
should not be changed without the express consent and authorization of the specifiers.
 The tubing should be stored in a dry weather protected area until ready for installation.
Tubing stored at temperatures below 55F should be brought into a heated area for at
least 24 hours before installation begins. PEX tubing gets more rigid as the temperature
drops. Tubing should not be stored in direct sunlight or in areas where the temperature
can exceed 125F.
 The tubing loops should be laid out within the allocated areas and not extended in any
way. When planning installation, the location of the manifold is paramount. Begin by
installing the manifold on either permanent or temporary supports, at the final designed
location. Manifolds cannot be moved once the tubing is installed.
 Supply and Return connections of loops are interchangeable, as the tubing is bi-
directional. However good practice is to make the supply, where the water is hottest, to
the outside walls. PEX tubing has a shape memory. As tubing is removed from the
rolls, unroll it. If the roll is simply expanded, there will be large loops that will make
securing it difficult.
 Refer to the materials chart included in the submittals for specific length/rolls to be used
for each loop or room area. Where a roll is long enough, it can be used for more than
one loop. Example: 3 loops of 330’ each are required. A 1000-foot long roll supplied
will be required. However excessive loop length will cause material shortage at the end
of the project.
 Tubing is marked at every 3 foot increment. While installing each loop, the length of the
loop must be continually monitored. The distance required as a leader from the manifold
to the heated area should be noted. This length is included in the maximum loop lengths
designed. As the tubing is placed in serpentine paths back and forth, allow for the length
of tubing required to return back to the manifold location. There are no hiding loops
that are too long or too short. The tubing is marked and will be exposed at the
manifold location. The balance valves within the manifold will allow balancing of flow
between loops but they will not compensate for loops that are too long or where there is a
great disparity in the loop lengths.
 Tubing should be secured into tracking if provided or directly to webbing or reinforcing
steel in wet pour installations. The tubing should be only secured with plastic tie wrap
straps. DO NOT use wire or any other metal restraints.