G2 Gas Fitter Practice Exam 2025 - Free Gas Fitter Practice Questions and Study Guide

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What is the minimum vent height required on a roof with a 12/12 pitch and no obstructions?

2 feet

4 feet

The minimum vent height required on a roof with a 12/12 pitch and no obstructions is 4 feet. This requirement is important for ensuring proper ventilation and preventing the accumulation of gas that could pose safety hazards. In instances where a vent is installed on a sloped roof, it is crucial for the vent to extend above the roofline to ensure that exhaust gases disperse effectively and do not re-enter the building.

A 12/12 pitch indicates a steep angle, which means that prevailing wind conditions can create challenges for venting. Thus, the 4 feet specification is designed to provide sufficient clearance to mitigate the risk of downdrafts and ensures that the vent remains unobstructed by atmospheric conditions. This height is in line with general building codes and best practices for vent installation systems on pitched roofs, thus enhancing the safety and functionality of the gas venting system.

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6 feet

8 feet

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