JOSAM Universal Clamping Ring

The Universal cast iron membrane clamping collar is designed for retrofit roof applications where the existing main roof drain body is to remain in place and continue to be operative. The bolting lugs of this collar match the bolt pattern of the majority of the common roof drain bodies and generally conform to the surface angles of the flange. This allows easy replacement along with adequate pressure on the membrane to insure water tightness. It is recommended to extend roof membrane into the sump of existing roof drain body.  This has longer fingers so that it will also fit smaller Josam drains.