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Gas Piping Connections
Alternate
Manifold
Gas Line
Location
Gas Valve
*Ground
Joint
Pipe
Union
*NOTE: Union may be inside furnace cabinet where allowed by local codes.
Manual Shut Off Valve
(upstream from ground joint pipe union)
*Ground
Joint
Pipe Union
Grommet
in Standard
Gas Line
Hole
Drip Leg
*NOTE: Union may be inside furnace cabinet where allowed by local codes.
COUNTERFLOW
34
Manual Shut Off Valve
Burners
(upstream from
ground joint
pipe union)
*Ground
Joint
Pipe
Union
Drip Leg
Grommet
in Standard
Gas Line
Hole
UPFLOW
Figure 36
Plug in
Alternate
Gas Line
Hole
Gas Valve
Burners
Figure 37
When gas line is in the alternate location, swap the position of
the plug and grommet.
Alternate
Grommet in
Gas Line
Standard Gas Line Hole
Location
*Ground
Joint
Pipe Union
Burners
Manifold
Drain Trap
Drip leg may terminate with a 1/2" x 1/8" pipe plug to
accommodate line gas pressure measurement.
Manual Shut Off Valve
UPFLOW - HORIZONTAL LEFT
Figure 38
Manual Shut Off Valve
Alternate
Union
Location
Drip Leg
Plug in Alternate Gas Line Hole
Plug in Main Gas Line Hole
Gas
Valve
COUNTERFLOW - HORIZONTAL RIGHT
Figure 39
(upstream from
ground joint
pipe union)
(upstream from
ground joint pipe union)
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