Installation Guide

26
Installation Practices
Figure 4.3 Supporting Manifold When Attaching Fittings
4.3 Routing
General Routing Practices
Routing requirements for CSST exible gas pipe can vary by locality. Be sure to conrm the
requirements of the administrative authority for the location where HOME-FLEX® is to be
installed before installing HOME-FLEX®. In general, HOME-FLEX® can be routed:
• Beneath, through, and along side oor and ceiling joists. This is typical for residen-
tial and commercial installations with basements or multi-oor routing.
• Inside hollow interior wall cavities. Routing inside wall cavities is preferred for ver-
tical sections of tubing. Horizontal runs through wall cavities should be avoided to
minimize the need for striker protection from puncture hazards.
• Through approved conduit underground or under building slabs. Under no cir-
cumstances is HOME-FLEX® to be routed underground or under slab unless it is
routed within a nonmetallic water-tight conduit that is at least ½" larger than the
outer diameter (OD) of the CSST tubing. Fittings and joints are not permissible in
such runs—the run must be one unbroken line of tubing. Runs underneath slabs
must be sleeved and vented per local codes.
• Outdoors. When installed outdoors, the yellow jacketing of HOME-FLEX® must be
intact along the entire run and protected from long term exposure to UV rays from
the sun. Any areas of exposed tubing are to be wrapped with self-bonding silicone
tape or sleeved to prevent threats from acids or chlorides.
• Along the perimeter of a building. Care must be taken to protect HOME-FLEX®
from the possibility of mechanical damage when installed along the exterior of
a building. If installed within 6 feet of the ground, HOME-FLEX® tubing must be
routed within a conduit or chase. If installed in a location where the tubing will
not be subject to possible mechanical damage, a conduit is not required, but is
recommended.
Tubing should not be supported by, or run near, conductive metallic systems such as metallic
appliance vents, ducting, or piping.
Careful consideration should be given to route HOME-FLEX® tubing in areas where
mechanical damage is least likely.
Clearance Holes and Notching
Clearance holes for routing tubing through
studs, joists, plates, etc. must have a diameter
at least ½" larger than the outside diameter
of the tubing (Table 4.3). Local codes pertain-
ing to structural members must be followed
Table 4.3 Recommended Routing Holes for Installation
of HOME-FLEX® Tubing
Tubing Size Drill Hole Size
½" (13 mm) 1⁄" (35 mm)
¾" (19 mm) 1½" (38 mm)
1" (25 mm) 1¾" (45 mm)