
Parker Hannifin Corporation
Parflex Division
Ravenna, Ohio
Bulletin No. 4660-PGP2T
Parflex
®
Flexible Gas Piping System
Design and Installation Guide
Gas Fireplaces
•
Parflex CSST can be routed directly to the shut-off valve of a gas fireplace
. Parflex can also be used
for fuel delivery to gas fireplace inserts and decorative fireplace heaters.
•
Parflex CSST should not be routed within the fire box of gas wands, log lighters or near wood and
composite logs where tubing damage can occur caused by crushing and excessive heat.
•
Parker FastMate fittings are approved for use as connections in concealed spaces. Connections can be
made directly to the flow control and shut-off valves in fireplace appliances. Parflex tubing, FastMate
fittings and valve connections can be installed in concealed spaces beneath floors and hearth or behind
walls and fireplace brick work.
•
When routing the Parflex CSST through masonry walls, do not remove the plastic jacketing. Route
tubing through appropriate sleeving and caulk the penetration of the masonry wall. All exposed plastic
jacketing should be removed within the fire box using a knife and the Parflex zip strip.
•
Protective sleeving is not required when routing Parflex CSST through ceramic liners used in decora-
tive heat generating fireplace fixtures.
•
Parflex CSST routed through sheet metal enclosures should be protected from wear caused by vibra-
tion. Tubing should be routed and supported to prevent contact with the metal enclosure. Protection
devices such as grommets, flexible steel conduit, conduit and rigid steel pipe can be used through
knock-out holes in the metal enclosure where appropriate. Materials used in fire-rated constructions
must meet applicable codes.
•
On occasion, the routing and configuration of CSST and flexible appliance connectors, which feed a gas
log lighter, fireplace or gas log set, can whistle due to high velocity gas flow. Whistling can often be
avoided by minimizing the number of tubing bends and increasing the size of the supply line. Determi-
nation of the supply line size can be made using the maximum flow capacities shown below.
Section 4.0 Installation Practices
Fireplace
Appliance
Max. Load
45,000 BTUH
(45 CFH)
83,000 BTUH
(83 CFH)
178,000 BTUH
(178 CFH)
Minimum tubing size recommended
1/2"
3/4"
1"