OS&B Universal 70500 Dishwasher Water Inlet Fitting. This elbow fitting is 3/8" compression x 3/8" MIP. The water inlet fitting provides fittings to connect the water supply to the water inlet valve.
 
Possible Repair Solution For:

Dishwasher will not fill, fills too slowly, leaking water.
Please Note: This is intended as a guideline only, as other items can cause the same symptoms.
This part is also known as a water inlet valve fitting, water inlet valve adapter, elbow fitting.