Product review (3 stars): This worked pretty well, the dual male coupler fits the 22mm ...
This worked pretty well, the dual male coupler fits the 22mm end very snuggly, but the 19mm end more loose, so you really have to crank down on the clamp. The drain coming from my (Samsung) washer was the smaller, 19mm, size so I'm a little worried that I could have damaged the hose when tightening it - so far after a month or so, no leaks however. This product would be a lot better if the couple just had both sizes - 19 + 22, otherwise, there's no reason for the hose to have 2 sized ends, as really only the bigger end is a pure fit for the coupler