What material should hangers and strapping be made of?

Hangers and strapping in plumbing systems should be made of approved materials that do not promote galvanic action. Galvanic action occurs when two dissimilar metals are in contact with each other in the presence of an electrolyte, leading to corrosion of one of the metals. Approved materials, which often include specific metals and plastic compounds designed for plumbing applications, help ensure durability and longevity of the plumbing system while preventing corrosion.

Using inappropriate materials like plastic may not provide the necessary strength and support needed for pipes, especially in high-stress environments. Wood can decay or warp over time due to exposure to moisture, compromising the support system. Lead is not a suitable option due to its toxicity and regulatory restrictions in plumbing applications. Therefore, choosing materials that are specifically approved helps maintain the integrity and safety of plumbing installations.