The Clamp-All coupling was designed to fulfill a need in the plumbing industry for a heavy duty coupling to join storm and sanitary DWV piping systems above and below grade. Since the company was formed, Clamp-All not only has met the need to design and produce a high reliability coupling for hubless cast iron pipe, but has been an advocate for the development and adoption of realistic performance standards and independent third party testing.
We believe that pipe couplings should be as durable as the pipe they join. Ours is. We have built a solid tradition, through independent testing, to demonstrate the performance of our products. We have also demonstrated our commitment to quality and reliability by offering you the strongest written guarantee in the industry.