Our Rubber Tee's are made from a high quality EPDM rubber making then strong and durable. They come with strong metal clips to ensure a tight seal, the clips are smooth on the edges to make them safe with fish. They can attache many different types of pipework such as PVC. waste and pressure pipe. Great to use in any pond, as there is no solvent glue used they can be taken off and re used at any time.