Ao Smith 100112420 Concentric Dv Termination Kit

Product Description

The AO SMITH 100112420 is a concentric direct vent termination kit designed for through-wall installation on tankless water heater systems. It handles both intake and exhaust in a single concentric assembly, with a 3-inch intake and 4-inch exhaust configuration. Accommodates wall thicknesses ranging from 12.0 inches to 18.0 inches. The kit includes a direct vent conversion kit, a 3x4 concentric termination, a universal adaptor, and a 3-in-1 aluminum flex gear clamp. Licensed plumbers and HVAC technicians install this hardware as part of a compliant venting system for sealed-combustion tankless units.

This termination kit is intended for residential tankless water heater installations requiring concentric direct vent through an exterior wall. The concentric design routes combustion air in and exhaust gases out through a single wall penetration, reducing the number of holes required and simplifying rough-in. It is confirmed for use with the T-KJr2-IN, T-K4-IN, and T-D2-IN tankless water heater models. Typical installations involve new construction or retrofit applications where a single exterior wall penetration is preferred over separate intake and exhaust runs.

Key Features

• Concentric 3-inch intake and 4-inch exhaust in a single wall termination assembly
• Accommodates wall thicknesses from 12.0 inches to 18.0 inches
• Includes direct vent conversion kit, concentric termination, universal adaptor, and aluminum flex gear clamp
• Single wall penetration design reduces rough-in complexity
• Compatible with confirmed AO SMITH tankless model families

Compatibility

Confirmed for use with AO SMITH tankless water heater models T-KJr2-IN, T-K4-IN, and T-D2-IN.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician in accordance with local mechanical codes and the appliance manufacturer's venting instructions. Shut off the water heater and disconnect power or gas supply before beginning any venting work. Verify wall thickness falls within the 12.0-inch to 18.0-inch range before cutting the wall penetration. Follow all applicable International Fuel Gas Code requirements for termination clearances from windows, doors, and other openings.

Technical Specifications

• Product Type: Termination Kit
• Vent Type: Concentric Direct Vent
• Intake Size: 3 inches
• Exhaust Size: 4 inches
• Wall Thickness Range: 12.0 inches to 18.0 inches

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100112420