The Cloghog had some "m22" adapter technicality??? That also went over my head that Sequoia might be able to clarify. It appears like the consumer hi pressure washers guns might have that instead of nat'l pipe thread NPT.
Don't remember anything like m22? What I bought is very simple-- the cloghog is a roll of semi-flexible hose, with a jet nozzle on one end and a standard hose type fitting on the other end.
I unplugged the factory hose and wand from my pressure washer, and screwed the fitting on the cloghog onto the pressure washer. I did not need any adapters. Then I played out some hose, and put the nozzle end of the cloghog down the drain and fired up the pressure washer.
The cloghog jet nozzle has multiple streams that shoot backward, and one forward. So with more force shooting backward than forward, it "wants" to go down the drain. If I hit a bend or obstruction, I just jiggled the hose or pulled it back a few times to either make it around the bend or make it past the obstruction.
I'm guessing I don't have any root problems, as this product would be totally ineffective against that. But it cleared 100% of my mud obstructions.