Lochinvar 100140480 PVC Concentric Vent Termination Kit - CVK3003 3-Inch

The Lochinvar CVK3003 (MPN: 100140480) is a 3-inch PVC concentric vent termination kit designed for sidewall direct venting on compatible Lochinvar commercial water heaters and wall-mount boilers. This kit combines combustion air intake and exhaust venting into a single, concentric pipe assembly, simplifying installation and minimizing wall penetrations.

Key Features:

• 3-Inch Concentric Design: Combines combustion air and exhaust vent into one pipe assembly through a single 5-inch wall opening
• PVC Construction: Durable SDR-26 PVC pipe construction rated for residential and commercial venting applications
• 3-Foot Equivalent Vent Length: Provides 3 feet of equivalent vent length when calculating total system run
• Certified to Industry Standards: Meets ANSI Z223.1 and CSA B149.1 requirements
• Complete Kit Includes: 4-inch diameter SDR-26 pipe, 2-1/2-inch diameter SDR-26 pipe, rain cap, and concentric wye fitting

What's Included:

• 4-inch diameter SDR-26 PVC pipe (outer)
• 2-1/2-inch diameter SDR-26 PVC pipe (inner)
• Concentric wye fitting
• Rain cap

The CVK3003 is the OEM-specified concentric vent termination kit for a wide range of Lochinvar Knight residential wall-mount boilers and commercial water heater models. Installation requires a single 5-inch diameter hole through the wall structure. Field-supplied PVC cement and primer are required for assembly. Note: Do not use field-supplied couplings to extend the kit pipes, as airflow restriction may result. This kit is also cross-referenced under part numbers SNR126 and SNR065.