Installation Instructions

CONCEALED FITTINGS LOCATION

The Pro-Flex

Mechanical Fittings have been tested and listed per the requirements of ANSI/AGA LC-1

for concealed use. The fitting may be used for concealed attachment to appliance valves, branch runs

using tee fittings, and length splices.

These guidelines address some of the most common situations where concealing the fittings is the only

practical alternative. These guidelines cannot address all applications of concealed fittings, but instead,

provide typical instructions to demonstrate the principles that apply to fittings listed for installation in

concealed locations. (reference National Fuel Gas Code, NFPA 54, Section 3.4.2)

a) New Installations - When multiple gas outlets are supplied from a single run of CSST,

each downstream outlet branch can be connected to the main run using a tee-type

fitting which can be located in a concealed location.

b) Fireplace "key valves" - Flexible piping connections to fireplace key valves can be

located in a concealed location, when accessibility is not readily provided.

c) Exclusion - Manifold stations (2 PSI system), which include the multi-port manifold,

shut-off valve and pressure regulator, shall not be installed in concealed locations

regardless of the qualifications of the tubing.

Modifications to Existing Systems

a) New Ceilings in Unfinished Rooms/Basements - CSST fittings originally installed in

accessible ceiling locations can be concealed in the event a ceiling is installed at a later

date.

b) Extensions to Existing Tubing Runs - A concealed tubing can be modified to permit an

extension to another appliance location provided there is sufficient capacity to supply

both appliances at the same time. If an accessible location for the modification is not

available, the existing tubing run can be modified with a tee fitting which will result in a

concealed fitting behind the wallboard.

Repairs to Existing

ubing Runs - Damaged tubing r

uns shall be repaired in accordance

with the instructions in this guide. The repair can result in a line splice that may ultimate-

ly be located in a concealed location.