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HORIZONTAL VENTING PVC TERMINATION
VERTICAL VENTING PVC TERMINATION
Venting Termination
The vertical inlet and exhaust outlet require a re-
turn bend or two medium or ring sweep radius 90
degree elbows to keep the air inlet and exhaust
outlet downward and prevent entry of rain.
Minimum twelve (12) inches above anticipated
snow level.
It cannot be connected to existing vent piping or
chimney.
4" PVC Schedule 40 piping and fittings are ac-
ceptable materials for the inlet vent system and
for the outlet vent system.
The total vertical and horizontal runs cannot ex-
ceed the maximum length with a maximum num-
ber of 90 degree elbows as specified in the table.
Eternal can be vented straight up and horizontal
section is not required for vertical terminations.
Condensate drain must be used in all vertical
terminations.
Venting Material: PVC-DWV (ANSI/ASTM D2665)
Once the vent terminal location has been
determined, make a hole through the exterior wall
to accommodate the vent pipe. Vent pipe must exit
exterior wall horizontally only.
Insert a small Length of vent pipe through the wall
and connect the coupling as shown below.
Place the 1/2" mesh metal screen inside the ter-
minal fitting and connect it as shown to the vent
pipe on the exterior of the building.
Seal any opening around the vent pipe or fittings
with mortar or silicone caulk as shown to the left.
Complete the rest of the vent pipe installation to
the water heater's vent connector fitting on the
blower outlet.
If necessary support horizontal run as previously
mentioned.
