Gruvlok® 0390009447 Red Rust Inhibiting Painted Ductile Iron Reducing Coupling, 4 in x 3 in, Grooved

The series 7010 reducing coupling makes it possible to directly connect two different pipe sizes, eliminating the need for two couplings and a reducing fitting. The specially designed reducing coupling gasket with a center rib assures proper positioning of the gasket and prevents the smaller pipe from telescoping into the larger during assembly.