Element
Section 7: Venting
L-OMM-0003_A
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Figure 14
– Concentric Vent Dimensions
7.3.1 Concentric Vent Connections to the Vent Pipe and Remote Air Inlet Duct
1. The Element
can obtain combustion air and exhaust products of combustion through 4”
exhaust IPEX System Concentric Vent Termination Kit. This option is not currently available
for water heater models LC9Q and LC10Q.
2. Do not exceed the maximum allowed combustion air duct and vent pipe equivalent lengths
provided in this manual. Remember to include the IPEX System Concentric Vent Termination
Kit in the maximum equivalent calculation. When calculating the additional length added by
the IPEX kit, use the diameter of the IPEX kit combustion air duct connection as the
combustion air duct diameter.
3. Select a concentric vent kit from the list above that matches the material type of the water
heater’s flue gas pipe, as described above, and is the same size as the flue gas pipe. 6”
venting can be used with a 4" IPEX concentric vent kit.
4. When using an IPEX System Concentric Vent Termination Kit connected to 6" PVC or CPVC
vent and remote air duct, use locally available fittings of the same material as the Kit to reduce
from 6" to 4", immediately before connecting to a 4” IPEX Concentric Vent termination Kit. The
reduction from 6" to 4" does not change the maximum allowed equivalent vent length or the
maximum number of elbows for 6" pipe.
7.3.2 Concentric Vent Kit Assembly, Installation and Support
5. Follow the concentric vent kit instructions to properly assemble the kit.
6. Follow the concentric vent kit instructions to locate and cut a hole in the roof or wall large
enough to accommodate the largest dimension of the kit. The size of the hole can vary
greatly, depending on the roof pitch.
7. For the IPEX System 636 Concentric Vent Kit, follow the procedures outlined in the System
636 Installation Guide:
a) Use solvent cement specified in installation guide to connect inner pipe to concentric
Wye fitting, then connect outer pipe to concentric Wye fitting.
b) Slide the assembly through the roof or wall penetration. (Install flashing if needed).
c) Kits must be securely fastened to structure, to ensure proper dimensions are maintained.
