Lochinvar & A.O. Smith 100112163 Kit

The Lochinvar & A.O. Smith 100112163 Kit is a professional-grade 3" PVC Concentric Termination Kit engineered for high-efficiency condensing water heaters and boilers. This ULC S636 compliant venting system allows for a single 4.5-inch to 5-inch wall or roof penetration, integrating both the combustion air intake and flue gas exhaust into one streamlined assembly. Designed to replace standard two-pipe systems, this concentric vent kit reduces terminal clutter on the building exterior while maintaining necessary separation between intake and exhaust to prevent recirculation. It is a direct OEM solution for A.O. Smith model 520 indoor condensing units and various Lochinvar Shield water heaters. Constructed from heavy-duty, corrosion-resistant PVC, the 100112163 ensures long-term structural integrity in Category IV venting applications. This kit includes the concentric Y-fitting, rain cap, and internal vent pipe assembly. Technicians should verify equivalent vent length calculations, as this assembly typically adds 5 feet of effective pipe length to the system's total resistance.

Key Benefits

• Single Penetration Design: Simplifies installation by requiring only one hole for both intake and exhaust, reducing labor time and structural impact.
• ULC S636 Certified: Meets rigorous safety standards for PVC concentric venting in high-efficiency gas-fired appliances.
• Aesthetic Terminal: Provides a clean, low-profile exterior finish compared to traditional "snorkel" or two-pipe terminations.
• OEM Compatibility: Guaranteed fit for specific A.O. Smith and Lochinvar condensing units, ensuring proper pressure switch operation and combustion stability.

Common Questions

What is the required hole size for the 100112163 concentric kit?
For this 3-inch kit, a 4.5-inch to 5-inch diameter hole is required depending on the wall or roof construction and clearance requirements.

Can this kit be used with polypropylene venting?
No, the 100112163 is specifically designed for PVC venting systems. For polypropylene applications, a compatible ULC S636 polypropylene-specific termination must be used.

Can the kit be shortened or extended?
The external pipe sections can be adjusted per manufacturer specifications, but any extensions must use approved SDR-26 pipe and should not exceed the maximum equivalent feet defined in the appliance's installation manual.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.