Technical Specifications

Pro-Flex
®
CSST
FITTING ASSEMBLY
ASSEMBLY PROCEDURES FOR PRO-FLEX® CSST
1
Make sure High-Temperature Sealing
Gasket is in base of Fitting
Double check to make sure High-Temperature
Sealing Gasket is in base of Fitting and hand-
tighten fitting to nut. NOTE: Before tightening,
check to make sure Retainer Ring, Slide Ring,
and Silicone O-Ring are in
the proper sequence. After hand tightening fitting to nut, give it one
additional 1/4 to 1/2 turn with a crescent wrench. During tightening rotate
the nut only, the body should not rotate with respect to the tubing.
Placement of Silicone O-Ring
Roll Silicone O-Ring over tube end and roll it
down to meet the slide ring.
Placement of Stainless Steel Slide
Ring
Place Slide Ring over the tube end and slide it
down to the retainer ring.
Placement of Retainer Ring
By hand, open ring wide enough to fit in the
valley behind the fourth (4th) convolution and
hand squeeze ring to close and fit snug. Do not
break the retainer ring in half.
Assembly of Mechanical Fitting
Slide nut over CSST tubing with threaded end
pointing out.
Strip Yellow Jacket
Using a utility knife, strip yellow jacket back
5-6 convolutions from the tubing end. Note: Do
not use tube cutter to make yellow jacket cut,
use utility knife.
ASSEMBLED VIEW
(Patented System)
#5,845,946
#5,857,716
#6,102,445
TROUBLE SHOOTING
MECHANICAL FITTING
CORRECTING LEAKS
Step 1 - Gradually tighten fitting until leak stops
Step 2 - If tightening does not stop after reaching
maximum torque of 35 lbs or 50 lbs (refer to
maximum torque for each size listed below),
STOP and open assembly and check
a. To see if they are properly assembled. If not correct,
go through assembly steps and test again for leaks.
b. Check to see that no foreign material is in
assembly. If so, clean out and re-assemble and
test again for leaks.
c. Check to see that none of the assembly pieces are
cracked. If so, replace, re-assemble and test again
for leaks.
d. Optional: use Pipe tape or Pipe Dope on NPT
Threaded Ends.
TORQUING METHOD FOR
FIELD ASSEMBLY
To achieve the proper Torque without a torque
wrench, first tighten the fitting to the nut until
resistance to hand tightening is so that you can no
longer continue. Then, using a crescent wrench,
tighten to 1/4 to 1/2 turn.
CAUTION: DO NOT OVER TIGHTEN
Maximum Allowable Nut Tightening Torques for connecting fittings to
corrugated stainless steel tubing
Size of Fitting Maximum Allowable Tightening Torque
3/8" (10mm) 35 ft.-lb.
1/2" (15mm) 35 ft.-lb.
3/4" (20mm) 50 ft.-lb.
1" (25mm) 50 ft.-lb.
1
1
/4" (31mm) 50 ft.-lb.
WARNING!
Improper installation or operation of the system may result in
fire, explosion, or asphyxiation. Only the components provided or
specified by Pro-Flex, LLC for the use of Pro-Flex
®
as part of the
fuel gas system are to be used in the installation. Use of
components from other flexible gas piping systems other than
those specified as part of Pro-Flex
®
system is prohibited and may
result in poor system performance and serious bodily injury or
property damage.
While every effort has been made to prepare this document in accordance with all regional model
codes in effect at its printing, Pro-Flex, LLC cannot guarantee that the local administrative authority will
accept the most recent version of these codes. It is the ultimate responsibility of the qualified installer to
determine suitability and acceptance of any building component including gas piping.
Pro-Flex, LLC
manufacturer of Pro-Flex® CSST assumes no responsibility for labor or material for
installations made without prior determination of local code authority acceptance.
2
3
4
5
6
7
Cut-to-Length
Using a standard tube cutter, cut tubing to the
desired length leaving approximately one inch
for fitting attachment. Clean up any jagged
edges burrs.
232584 PF-CSST_17647-TF-PF-CSST 12/20/11 1:59 PM Page 1