A rainproof exhaust pipe for gas water heaters

CN224434707UActive Publication Date: 2026-06-30CHINA AVIATION PLANNING AND DESIGN INSTITUTE (GROUP) CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: CHINA AVIATION PLANNING AND DESIGN INSTITUTE (GROUP) CO LTD
Filing Date: 2025-07-09
Publication Date: 2026-06-30

AI Technical Summary

Technical Problem

During strong winds and rain, rainwater can easily enter the end of the exhaust pipe of a gas water heater or the gap between the outer wall of the exhaust pipe and the wall opening, causing backflow into the gas water heater or seeping into the wall, resulting in damage.

Method used

The exhaust pipe structure of the gas water heater adopts a rainproof design, including a pre-drilled hole in the external wall, a horizontal pipe inside the wall, a bend, a vertical pipe inside the wall, a horizontal pipe outside the wall, and a sealing structure. It uses components such as sealing rings, sealing tape, and rainproof plugs to form a sealing system to prevent rainwater from entering the gaps.

Benefits of technology

It effectively prevents rainwater backflow from damaging gas water heaters and exterior walls, is easy to install and maintain, avoids high-altitude operations, and has strong applicability.

✦ Generated by Eureka AI based on patent content.

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Figure CN224434707U_ABST

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Abstract

This utility model relates to the technical field of gas water heater exhaust pipes, and discloses a rainproof gas water heater exhaust pipe, including: a pre-drilled hole in the exterior wall, an inner horizontal pipe set in the pre-drilled hole in the exterior wall, a bend pipe connected to one end of the inner horizontal pipe, and an inner vertical pipe connected to the bend pipe; the end of the inner horizontal pipe away from the bend pipe is connected to an outer horizontal pipe, and a sealing structure is provided between the inner and outer horizontal pipes. The sealing structure includes a first sealing ring fitted on the inner horizontal pipe, a second sealing ring fitted on the outer horizontal pipe, and a rainproof plug fixed on the outer horizontal pipe. Sealing tape is wrapped between the first sealing ring and the inner horizontal pipe, the second sealing ring is set between the outer horizontal pipe and the pre-drilled hole in the exterior wall, and the rainproof plug fits against the outer side of the pre-drilled hole in the exterior wall, which can prevent rainwater from entering the gap between the exhaust pipe and the wall opening and damaging the wall. At the same time, the entire installation, maintenance or replacement is relatively convenient, and personnel only need to complete the operation on the indoor balcony.

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