The ends of an abandoned sewer pipe may be capped with a brick wall at least how thick?

The ends of an abandoned sewer pipe may be capped with a brick wall at least how thick?

• A. 4 inches
• B. 6 inches
• C. 8 inches
• D. 12 inches

Answer: (C)

Sealing an abandoned sewer pipe isn’t only about blocking odors; it’s a structural and safety measure. The end needs a solid masonry closure to resist soil pressure, prevent collapse, and stop sewer gases or pests from entering or migrating. Eight inches is the minimum thickness for a brick wall cap because it provides enough strength and durability—roughly two brick courses with mortar—to withstand earth loads over time. Thinner caps, like four or six inches, are not reliable and can crack or crumble, while twelve inches is more than necessary and adds unnecessary cost. So the standard minimum is an eight-inch-thick brick wall.

Sealing an abandoned sewer pipe isn’t only about blocking odors; it’s a structural and safety measure. The end needs a solid masonry closure to resist soil pressure, prevent collapse, and stop sewer gases or pests from entering or migrating. Eight inches is the minimum thickness for a brick wall cap because it provides enough strength and durability—roughly two brick courses with mortar—to withstand earth loads over time. Thinner caps, like four or six inches, are not reliable and can crack or crumble, while twelve inches is more than necessary and adds unnecessary cost. So the standard minimum is an eight-inch-thick brick wall.