I'm looking to clear some roof space for solar panels and have a main stack that currently runs vertically through the roof of my building. Is it possible to transition this stack to run horizontally or at a slight slope along the exterior of my house to reach a different area of the roof? I'm also wondering if there are any building codes that I need to consider with this setup. Thanks for your help!
3 Answers
I've moved vents for my solar project too! Ideally, you want to keep your vents around a 45-degree angle or steeper to avoid any water flow issues. Remember, vents are designed to allow sewer gases to escape, not to carry liquid like drain pipes, so having a significant slope isn't necessary. Just make sure that any water that enters doesn't collect or block the vent flow.
From a mechanical engineering perspective, plumbing vents don’t need to be sloped like drains do since they aren't meant to channel liquids. They serve as a vacuum breaker for sewer gases. However, keep in mind that there are regulations on the maximum distance you can run a vent, so double-check your local building codes to stay compliant.
Yes, you can run plumbing vents horizontally as long as you terminate them vertically through the roof. It's generally recommended to maintain a slope of about 1/8" per foot towards the fixtures to prevent any rainwater from pooling. Just make sure to avoid any low spots where water can collect.
What if I want to run it almost flat? Is that still okay?
Good point! So basically, as long as the vent isn't totally flat, I should be fine?