Mendota ML39 Assembly, Installation And Operating Instructions page 43

Gas Pressure Requirements and Checking
Two pressure taps for checking input and output gas pressures are located on the main gas valve. A qualified installer should
use this fitting for setting the correct gas pressure during initial installation.
The appliance and its appliance main gas
valve must be disconnected from the gas
supply piping system during any pressure
testing of that system at test pressures in
excess of 1/2 psi (3.5 kPa).
The appliance must be isolated from the gas
supply piping system by closing its equ ipment
shut-off valve during any pressure testing of
the gas supply piping system at test pressures
equal to or less than 1/2 psi (3.5 kPa).
Drip Leg Requirement
A drip leg/ sediment trap must be installed within the
main gas supply line serving this appliance.
Figure 3-34 Drip Leg/ Sediment Trap
Manual Gas Shutoff Valve Requirement
If local building codes require one, obtain an external keyed wall-mounted or
floor-mounted manual gas shutoff valve approved per local gas plumbing codes
and install per local gas plumbing codes in the specified location. Local
requirements supersede all other codes.
85-03-01136
Figure 3-33 Main Gas Valve
Figure 3-35 Keyed Manual Gas Shutoff
Valve
ML39 Page 43