When making a mechanically extracted joint for a potable water line, what should be the minimum height of the sides of the extracted joint?

The minimum height of the sides of the extracted joint being set at three times the thickness of a branch tube wall is rooted in maintaining optimal structural integrity and creating a reliable seal in potable water systems. This height ensures that there is adequate overlap for effective mechanical support and alignment of the joint, reducing potential weak points where leaks could develop.

Using three times the branch tube wall thickness provides sufficient material to absorb and distribute stresses during operation. Additionally, this specification helps to account for variations in the materials and installation conditions, ensuring that the joint is robust enough to withstand both internal pressures and external forces that might occur due to ground movement or thermal expansion.

Setting the height at this level also enhances the overall durability of the joint, promoting longevity and reducing maintenance needs over time. Joint integrity is crucial in potable water lines, as leaks can lead to contamination and water loss, making this standard an essential consideration for plumbing professionals.