Gray water gate valve size?

I need to replace the gray water gate valve on my 2017 T@B S Max. Is the valve a 1-1/2 inch size? I can't make out the markings on the valve, so I can't see what brand it is. The black tank gate valve is made by Bristol. would it be the same for the gray water valve? Would other brands be fine for the replacement (e.g., Camco or Valterra)?