C Longer Vent Runs Using A Combination Of 4" To 6" Pipe - Munchkin 399M Installing, Operating & Maintaining

Required: 4 Pcs. 4" 90 degree elbow (4 x 5 = 20 Equivalent Feet) = 20 Equivalent Feet
Required: 20' of 6" Plastic PVC Pipe (20 x 1 = 20 Equivalent Feet) = 20 Equivalent Feet
Total Friction Loss in Equivalent Feet (20 + 20 = 40 Equivalent Feet) = 40 Equivalent Feet
C. LONGER VENT RUNS USING A COMBINATION 4" TO 6" PIPE
Do not exceed the 85 foot maximum requirement for 4" PVC and the 125 foot
maximum requirement for 6" PVC (intake plus exhaust piping added together)
including fitting allowance shown in friction loss equivalent table on previous page.
Transitioning from 4" to 6" should be done in the Vertical position to avoid
condensation blockage. If done in the horizontal position check to make sure
condensation blockage will not occur.
The connection of air inlet and exhaust vent at the heater must remain 4" and each vent must extend
from the heater a minimum of 15 equivalent feet before transitioning to a 6" vent. The overall
extended maximum length of pipe on the inlet exhaust combined, must not exceed 125 equivalent
feet. Listed below are the 4" and 6" size equivalent table.
Example: Installation requires the following material for both the inlet and exhaust piping when
extending the vent run for the Munchkin.
Requirements for 4" Venting
2 Pcs. – 4" 90 degree elbow (2 x 5 = 10 Equivalent Feet) = 10 Equivalent Feet
20' of 4" Plastic PVC Pipe
Total of 4" Equivalent Piping with Fittings
Requirements for 6" Venting
6 Pcs. – 6" 90 degree elbows (6 x 5 = 30 Equivalent Feet) = 30 Equivalent Feet
4 Pcs. – 6" 45 degree elbows (4 x 3 = 12 Equivalent Feet)
40' of 6" Plastic PVC Pipe (40 x 1 = 40 Equivalent Feet)
Total of 6" Equivalent Piping with Fittings
Total Friction Loss in Equivalent Feet for both 4" and 6" (30 + 82 = 112
Equivalent Feet) = 112 Equivalent Feet
The Munchkin is not intended to be common vented with any other
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CAUTION
CAUTION
Fittings or Piping
4" or 6" 90 degree elbow
4" or 6" 45 degree elbow
4" or 6" Coupling
4" or 6" air inlet tee
4" or 6" Plastic Pipe
4" or 6" V2000 Vent Kit
(20 x 1 = 20 Equivalent Feet) = 20 Equivalent Feet
DANGER
existing appliance!
Equivalent Feet
= 5
= 3
= 0
= 0
= 1
= 0
= 30 Equivalent Feet
= 12 Equivalent Feet
= 40 Equivalent Feet
= 82 Equivalent Feet
VENTING