Product review (1 stars): The check valves are a great idea, but all they did was cause us ...
The check valves are a great idea, but all they did was cause us to be frustrated.  About every 3-4 loads the check valves would trip even though no leaks had occurred.  The reset procedure made  these hoses a big waste of my time.  A few times per week I had to go under the laundry tub to shut  off the water and disconnect the hoses.  Doing that repeatedly was a waste of my time.