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The AO SMITH 100112415 is a 4-inch rain cap designed for non-condensing vent systems that terminate through the roof. It seals the top of the vent stack to block rain intrusion, pests, birds, and other debris from entering the venting system. With a 4-inch diameter and 7-inch width, this cap fits directly over the vent pipe and provides reliable weather protection for residential water heater and boiler installations. Licensed plumbers and HVAC technicians install this component as part of a complete venting assembly on non-condensing appliances.
This rain cap is suited for rooftop vent terminations on non-condensing gas appliances. It is confirmed compatible with specific AO SMITH vent kit components including T-KJr2-IN, T-M32, T-D2-IN, T-M32-ASME, and T-K4-IN. Typical installation scenarios include residential water heater venting where the flue exits vertically through the roof deck and requires protection from weather and wildlife infiltration.
Compatible with AO SMITH vent components T-KJr2-IN, T-M32, T-D2-IN, T-M32-ASME, and T-K4-IN. Intended for use with non-condensing vent systems requiring a 4-inch rooftop termination cap.
Installation should be performed by a licensed plumber or HVAC technician in accordance with local codes and the appliance manufacturer's venting instructions. Shut off the appliance and allow the vent to cool before handling any vent components. Ensure the cap is properly seated and secured at the roof penetration to prevent movement from wind or thermal expansion. Follow applicable mechanical codes for rooftop vent clearances and flashing requirements.
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