Use and Care Manual

C. ALLOWED SCHEDULE 40 COMBINED VENT LENGTHS (PVC, CPVC, PP)
D. TIGHTENING WATER HEATER COLLAR TO EXHAUST VENT AND INTAKE PIPE
Figure 6 – Correct Installation into the Water Heater Collar
Figure 7 – Transitioning from 3” to 2” Vent Pipe
Table 10 – Approved Combined Vent Lengths
This appliance uses 2” or 3” diameter pipe for exhaust vent and intake pipe. In order to use 2” pipe, it is
required to reduce pipe size in a vertical length of pipe with a 3” x 2” reducing coupling (not included). Follow
the steps below to install 3” pipe into the appliance collar. See Figure 6 for additional details.
1. Clean and dry the appliance connection. DO NOT use primer or cement on the
appliance connection.
2. Push the length of pipe into the connection until it touches the bottom of the fitting.
3. Tighten the clamps using a screwdriver.
4. Ensure the pipe is secure before continuing installation.
5. For 2” installations, install the reducing coupling in a vertical section of pipe. At least a 6” length of 3”
pipe MUST BE INSTALLED before reducing to 2”. See Figure 7.
NOTE: When using more than 1 elbow, reduce maximum allowable length:
• 5 feet (1.5 M) for each additional 3” 90º elbow
• 2.5 feet (.75 M) for each additional 3” 45º elbow
• 8 feet (2.4 M) for each additional 2” 90º elbow
• 4 feet (1.2 M) for each additional 2” 45º elbow
MODEL
2” COMBUSTION AIR/ VENT PIPE 3” COMBUSTION AIR/VENT PIPE
MAX MAX
TCWH 180-AS /
TCWH 199-AS
50’ (15.24 M)
100’ (30 M)
25