Installation Guide

24
Installation Practices
½" larger than the outer diameter (OD) of the CSST tubing. Fittings and joints are not permis-
sible in such runs—the run must be one unbroken line of tubing. Runs underneath slabs must
be sleeved and vented per local codes. (See Figure 4.8 and Figure 4.9)
Note: If installed underneath mobile homes or in crawl spaces, HOME-FLEX® should be
installed in accordance with the above Outdoor Installation Issues section.
4.4 Protection
Protection is required when HOME-FLEX® tubing is concealed, constrained, and within 3
inches of a potential threat.
HOME-FLEX® exible gas tubing must be adequately protected wherever it is at risk of dam-
age from puncture, shearing, crushing, or other physical threats. Tubing is to be protected at
support points, and when passing through structural members of the building such as studs,
joists, and plates as outlined in this section. If the tubing requires protection, the measures in
this section should be followed.
Striker Plates
Shielding devices (striker plates) are used to protect the
HOME-FLEX® tubing from puncture threats such as drill bits,
nails, screws, etc. Such devices are required when the tubing
is concealed and is constrained such that the tubing would
not be able to move if struck by a puncture threat.
1. At support points and areas of possible penetration less
than 2 inches away from any edge of a stud, joist, plate,
etc., shielding is required both at the area of support and
within 5 inches of each side. (Figure 4.10)
2. At support points and points of possible penetration 2-3
inches from any edge of stud, joist plate, or other mem-
ber, shielding is required throughout the area of support.
(Figure 4.11)
3. At termination points
using the HOME-FLEX®
termination ange,
HOME-FLEX® Flexible
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.
Figure 4.8 Installation in Non-Metallic Conduit Under Slab
Ends of conduit do not have
to be sealed
4" Min
PVC or PE Conduit*
No minimum burial depth beneath slab except
as specied by local code
Recommended minimum bend radius: 6"
*ID of conduit should be at least 1/2" greater than OD of CSST
Figure 4.9 Installation in Non-Metallic Conduit In Slab
Ends of conduit do not have
to be sealed
CSST
4" Min
PVC or PE Conduit*
1
1
⁄2" minimum concrete cover
1
1
⁄2" Min
Footing
Recommended minimum bend radius: 6”
*ID of conduit should be at least 1/2” greater than OD of CSST
Figure 4.10 Elevated View of Unsupported
Horizontal Tubing Run
3
1
⁄2"
5"
Protected Area
Protected Area
Outside
Wall
Support
Adequate
Distance for
Escape
Non-Restrained Length
(Safe From Puncture)
Less than 2"
5"
5"
26"
Figure 4.11 Shielding at Support Area When Penetration is 2-3 inches from Edge
Support Joist
Striker Plate
Between 2-3"