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VENTING
PART 4. VENTING
A. APPROVED VENTING MATERIALS
EXHAUST VENT
Use Plastic 3” and 4” and 6” Pipe Schedule 40 or 80.
1. Non-Foam Core PVC Pipe
2. Non-Foam Core CPVC Pipe
3. Non-Foam Core ABS Pipe
Vent Piping must conform to following
1. PVC Non Foam Core Pipe (Polyvinyl Chloride) to ASTM D-1784 Class 12454-B, Formerly desig-
nated Type 1, Grade 1.
2. CPVC (Chlorinated Polyvinyl Chloride) Class 23447-B, Formerly designated Type IV, Grade 1 con-
forming to ASTM D-1784.
3. ABS (Acrylonitrile-Butadiene-Styrene) Class 3-2-2-2-2 conforming to ASTM D3965.
The Munchkin is a direct vent appliance. The Munchkin is listed as a Category
IV Condensing Appliance. (The Munchkin Venting is rated at Zero Clearance
to combustibles.)
Note: For Concrete construction or to meet certain fire codes, exhaust and inlet piping at the wall
penetration to the Munchkin must be CPVC Schedule 40 or 80 to meet local fire codes. The balance
from the penetrated wall to the outside, may be PVC Schedule 40 or 80.
INTAKE VENT
Use the same material as used for exhaust. Plastic Pipe or Cellular Foam Core Pipe may be used for
the inlet only, NEVER ON EXHAUST PIPING!
B. VENTING THE MUNCHKIN VWH IN 3”, 4” OR 6” PLASTIC PIPE
DANGER
Foam Core Pipe is not to be used in connecting the exhaust pipe.
DANGER
It is extremely important to follow these venting instructions carefully. Failure to do
so can cause severe personal injury, death or substantial property damage.
WARNING
This vent system will operate with a positive pressure in the vent pipe. Do not
connect vent connectors serving appliances by natural draft into any portion of
mechanical draft systems.
DANGER
It is extremely important to follow these venting instructions exactly. Failure to do so
can cause severe personal injury, death or substantial property damage.