Morris Couplings are made to join threaded or unthreaded piping by offering a pressure seal that is equalised across the full surface without bending the wall. Heavy-gauge zinc-plated galvanised steel and 304 stainless steel are used to construct them as usual, with aluminium also being an option upon request. Morris couplings come included with an earthing strip and a white food-grade rubber gasket. By following the above link, you can purchase the couplings and gaskets from PAR Direct online.
Connecting pipework for powder transfer.