10 Pieces 05/10 08/13 15/21 20/27 12/17 Inch Carbon Steel Sealing Plug, Plumbing Plug Stopper with Internal Hexagonal Water Pipe Plug for Pipes

All plumbing or mechanical connections need to be sealed using a rigid or flexible waterproof barrier. Static and dynamic connections can be made watertight using fibre or rubber washers, O rings or lip seals, all of which need to chosen to match the type of liquid and pressure they are required to contain.