location
Hi,I have a 1989 Cat 30 and the holding tank is under the port side (facing forward) seat that is at the table. I lift the cushion and there is piece of wood covering the opening to a large black plastic type box under the seat. I have Y valve that diverts the waste overboard or into this holding tanking. When I empty the holding tank, it can be pumped out at a station or discharged overboard through the macerator pump. Hope this helpsCM