Name This Part - RW 3901MB

[Scraper]

Found this in a drawer in my new to me 5th Wheel. Light blue, “bypass cap” imprint. Anyone know what it’s for?

[mhs4771]

I can only guess, but maybe used to by-pass the water filter in the fridge, because I don't think you can dispense water from the fridge without a filter in place.

[Scraper]

That’s it! Pulled out the old filter tonight and used the bypass plug. Don’t plan to use the refrigerator water or make ice...

Thanks!