From Ryno
Pipe sleeves are used where pipework passes through the roof structure. They are a simple and effective means of bonding the pipe to the membrane. The roofing membrane is dressed over the circular flange of the pipe sleeve. A robust metal fastening device is then tightened over the pipe sleeve, forming a watertight junction. Benefits Simple to install Effective means of bonding piping to the roofing membrane Maintains a watertight seal to your flat roof Pipe Sleeves are available manufactured from EPDM and PVC-u