Maytag MAH2400A Front Load Washer "fitting non return valve" Questions

non return valve fitted at the pump end of the outlet hose, this wud prevent u blowing down it, u need to remove the hose completely from the pump to check for blockage. Polz rate my solution. Thanks.

...fitting, and was trying to figure out if the washer connects to the with a pipe barb and clamp the drain hose to that, I have never seen a hook up like this before, got me thinking about it, don't ...

...as I'm in over $200 just to get a repairman in my door. CHECK THE PIPE TO THE DRAIN HOSE AND FILTER TRAP IF ONE FITTED IF BLOCKED CAN CAUSE THE SAME THING ESPECALY IF YOU HAVE A NON RETURN VALVE ...