Sleeve

A sleeve in plumbing is a pipe or conduit installed through a wall, floor, or ceiling to protect another pipe passing through the same opening. It acts as a barrier, preventing damage to the inner pipe and accommodating expansion, contraction, or movement caused by thermal or structural shifts. Sleeves are typically made of materials like PVC, metal, or rubber, depending on the application and the type of pipe being protected. Proper installation of sleeves is essential to maintain building integrity, prevent leaks, and ensure compliance with fire-rated wall penetration requirements.