17
GAS SUPPLY REQUIREMENTS
NOTE: IF INSERT IS TO BE OPERATED WITH LP GAS, SEE PAGE 34 BEFORE PROCEEDING.
CORRECT GAS PRESSURE AND PROPER GAS SUPPLY LINE SIZING IS IMPERATIVE TO THE SUCCESSFUL PERFORMANCE OF
YOUR ENDOTA GAS FIREPLACE INSERT. BE SURE THE GAS SUPPLIER OR PLUMBER CAREFULLY CHECKS FOR CORRECT GAS
PRESSURE AND GAS LINE SIZING WHEN INSTALLING THE FIREPLACE INSERT.
IT IS CRITICAL TO CAREFULLY CHECK FOR GAS LEAKS WHEN HOOKING UP THE FIREPLACE INSERT -- CHECK WITH SOAP &
WATER SOLUTION.
BE SURE TO INSTALL FLEX GAS LINE WITH BRASS-TO-BRASS FITTINGS TO PREVENT GAS LEAKS AT CONNECTIONS.
GAS SUPPLY PIPING MUST INCLUDE A DRIP LEG TO ELIMINATE THE POSSIBILITY OF CONTAMINANTS ENTERING THE GAS
TRAIN. ADHERE STRICTLY TO LOCAL AND NATIONAL CODES.
GAS SUPPLY LINE SIZING
The Mendota Gas Insert comes equipped with a 3/8" N.P.T. [1.0 cm] inlet on the main gas valve. Gas supply pip-
ing may enter the cabinet from either the left or right side.
The proper gas line diameter must be selected to run from the supply regulator to the Insert. Refer to the follow-
ing table for proper gas pipe diameters.
PIPE LENGTH
[FEET]
SCHEDULE 40 PIPE
INSIDE DIA.
TUBING, TYPE L
OUTSIDE DIA.
NAT.
L.P.
NAT.
L.P.
0-10
1/2" [1.3 cm]
3/8" [1.0 cm]
1/2" [1.3 cm]
3/8" [1.0 cm]
10-40
1/2" [1.3 cm]
1/2" [1.3 cm]
5/8" [1.6 cm]
1/2" [1.3 cm]
40-100
1/2" [1.3 cm]
1/2" [1.3 cm]
3/4" [2.0 cm]
1/2" [1.3 cm]
100-150
3/4" [2.0 cm]
1/2" [1.3 cm]
7/8" [2.3 cm]
5/8" [1.6 cm]
150-200
3/4" [2.0 cm]
1/2" [1.3 cm]
7/8" [2.3 cm]
3/4" [2.0 cm]
NOTE:
Some areas allow copper tubing or galvanized pipe - check with local approval agencies and codes NEVER use plastic
pipe.
GAS PRESSURE CHECKING REQUIREMENTS
A pressure tap for checking gas pressure is located on the main gas valve. A qualified installer should use this
fitting for setting the correct gas pressure during initial installation.
If supply gas pressures exceed 1/2 PSIG
[3.5KPA], the appliance must be isolated
from its supply with an approved manual
shut-off cock. This manual shut-off cock
must be closed during any supply line pres-
sure testing. Check with your gas supplier or
plumber.
If the factory-built fireplace has no gas ac-
cess hole(s) provided, an access hole 1.5” or
less may be drilled through the lower sides
or bottom of the firebox in a proper work-
manship like manner. This access hole must
be plugged with non-combustible insulation
after the gas supply line has been installed.
