Installation Guide
HOME-FLEX CSST 21
Fitting Assembly
Table 4.2 Recommended Horizontal and Vertical Support Spacing for HOME-FLEX® Tubing
Tubing Size Horizontal Support Spacing Vertical Support Spacing
½" (13 mm) 6 ft.
10 ft.¾" (19 mm)
8 ft. (USA) 6 ft. (CAN)
1" (25 mm)
4.2 Fitting Assembly
HOME-FLEX® ttings achieve seal by compressing the tubing into the gasket (Figure 4.2). It is
critical that the cut end of the tubing is clean of
any burrs or jagged edges, and that there is no
debris on the tubing or gasket. A seal is achieved
with a good deal of force (Table 4.3). In the
absence of a torque wrench, the general guide-
line is to tighten with two wrenches (one holding
the tting in place, the other turning the ange
nut counter-clockwise) until the nut will no lon-
ger turn and only 2-3 threads are showing.
Note: The gasket can only be used once. Once it has been compressed (Figure 4.2) during
the assembly process, it cannot be reused. A new gasket must be installed in the tting
Note: Not all titngs include an o-ring (Figure 4.2-3).The o-ring does not function as a gas
sealing mechanism in the tting assembly. The o-ring keeps moisture and corrosives out
of the area between the tubing and tting ange. If the o-ring is misplaced or not present
and there is risk of outside moisture or contaminants entering the assembly, wrap with the
assembly with self-bonding silicone tape from the tubing jacket to the end of the nut ange.
Male, Female, Union and Tee Fitting Assembly Overview
Tubing
Flange Nut
Retainer Ring
Fitting
NPT
Parallel
Table 4.3 Recommended Force for HOME-FLEX®
Fitting Assembly
Tubing Size Torque Value
½" (13 mm) 62 lbft
¾" (19 mm) 62 lbft
1" (25 mm) 74 lbft
Figure 4.2 (1) Gasket in Fitting Before Assembly, (2) After Assembly (note groove in gasket), (3) Fitting with and without
o-ring; and (4) Compressed Tubing