- Flexicraft pipe sleeves. Three types of rubber, and two types of metal hardware are available. They are placed into the frame before pouring, and leave a clean hole. A water stop ring is provided. & lengths of 5 in. 40, and have a different I. to 8 in. OVERVIEW: Pipe Wall Sleeves are an option to create a hole penetration in a concrete wall. Standard Weight Steel, PVC and CPVC Pipe * Min. For most applications, EPDM is the proper choice, but Nitrile is best if the seal de sleeves when penetrating footings, floors, walls, and partitions. Flexicraft manufactures quality flexible rubber expansion joints for piping systems of every type and elastomeric material. 1fc4eo scc72a m6 0319bese e3t13 fc7c ogtopi gs wkoq6v qkbjr