Installation Guide

30
Installation Practices
Protective Conduit should be installed to protect the CSST in the area between the striker
plates and the outlet. (Figure 4.12)
4. For tubing routed horizontally between studs, striker plates should be installed at each
stud, and Flexible Protective Conduit, or other approved conduit, should be installed
across the entire length of the run.
5. If striker plates can’t reasonably be installed (like be-
tween oors with enclosed joist areas or installations
when walls are already in place), schedule 40 steel pipe
has been found acceptable by CSA International for
puncture protection. Steel pipe must have an inner di-
ameter at least ½" larger than the outer diameter of the
HOME-FLEX® tubing (Table 4.4). Protection must extend
5 inches beyond the penetration of the structural mem-
bers. A 12 inch pipe length is acceptable for penetration
of a single stud. Despite this approval, the use of striker
plates is recommended whenever possible.
Avoiding Puncture Threats
The best way to protect from puncture threats (and poten-
tially speed your installation) is to route tubing in areas of
the structures where no added protection is necessary. The
guidelines below will help the installer route
HOME-FLEX® tubing in areas where secondary
puncture protection isn’t required:
1. Support tubing such that it is more than 3
inches away from any outside edge of a stud,
joist, plate, etc., or wall surface. (See Figure
4.13 compared to Figure 4.11)
2. In non-restrained installations, make sure
that the tubing can move at least 3 inches from the direction of potential penetration.
3. Tubing supported under joists in basements or crawl spaces does not require added pro-
tection so long as it is not concealed by wallboard or ceilings and is at least 3" away from
puncture threats through oors or ceilings.
4. Added protection is not necessary in unnished garage walls where the tubing is clearly
exposed so long as puncture threats do not exist from the outside wall.
Through-Wall Penetration
HOME-FLEX® tubing and its polyethylene jacket have been tested to the ame spread and
smoke density requirements of ASTM E84 and meets AGA and ANSI LC-1 limits imposed for
this criteria. HOME-FLEX® is classied as NFPA Class A/IBC Class A with a ame spread value
of 0 and a smoke density value of 80. Other requirements for re rated resistive constructions
may be imposed by local codes. The Qualied Installer must meet local building codes per-
taining to ame and smoke density regulations for nonmetallic materials at all times.
Table 4.4 Steel Pipe Size for Puncture Protection
HOME-FLEX® Size Sch 40 Steel Pipe Size
½" 1¼"
¾" 1½"
1" 1¾"
Typical Wall Stud
(Wood or Metal)
Termination
Outlet (Stud
Mounted)
Stripwound
Metal Hose
Striker Plate
Interior Wall
3-1/2"
Less than 2"
Figure 4.12 Use of Flexible Protective Conduit
Striker
Plate
Less than 3"
Typical Wall Stud
(Wood or Metal)
Interior
Wall
Termination
Outlet (Stud
Mounted)
Flexible
Protective
Conduit
3
1
⁄2"
Figure 4.13 Penetration Point Greater than 3" from Edge of Stud, Joist, Plate, etc.
Floor
Support Joist
Greater than 3"
Greater than 3"