What is the required support spacing for 1 1/4" copper tubing (horizontal)?

For 1 1/4" copper tubing installed horizontally, the required support spacing is 6 feet. This spacing is determined based on standards and best practices that ensure the integrity and stability of the piping system. Proper support is critical in preventing sagging and undue stress on the joints and connections, which can lead to leaks or failures.

The regulations typically stipulate that copper tubing should be adequately supported to handle the weight of the piping, as well as the effects of thermal expansion and contraction that occur with changes in temperature. Support at intervals greater than those defined can lead to excessive bending, which can damage the tubing or the system as a whole. Hence, maintaining a spacing of 6 feet between supports provides a balance between adequate support and efficient use of materials.