Yesterday I was confronted by a brand new (< 1 year old) Bosch dishwasher that was not completely draining. It had been installed in an older home (+ 25 years).
I ran through a wash cycle and the water gushed into the GD but the GD started to fill up a bit. Ran the GD but no improvement.
Killed the machine & decided to break open the trap that the GD feed into. Trap was clean (no food waste / grease / soap gunk) EXCEPT for an old style can / bottle opener (aka church key) !!!!
The sink is a double sink. The dishwasher feeds into the GD. The GD output goes into the only trap. The second sink drain feeds into the GD output just above the single trap.
Obviously the church key did not pass through the GD. I checked the second sink drain opening but the slots in the drain did not open to accept the church key.
The church key was a bit rusting indicated that it had been there a while (maybe a couple years).
I'm stumped about how it got there.
cheers Bob