This is the Valterra A01-2001BKBU, which is a black fresh water inlet hatch that has both a gravity and city fill option. This is a great option for adding/repairing a fresh water hatch on your RV, Camper, or Trailer. Link to purchase: https://amzn.to/3oSVdRw
Specifications:
1/2″ MPT / 1-1/4″ barb connections
1/2″ air vent
OD: 7-1/2″ W x 5-1/4″ H