I have a 1999 Signature XL fifth wheel...and for some reason my Galley tank won't drain and was leaking under the belly yesterday. I poured some Unique solution in there but it still has not worked and it's been twenty four hours. I have checked all over the camper and there is no extra pull for the tank There are only three. Black tank empties fine but the Galley is full...can anyone help me or direct me somewhere. I am in Palatka Florida and will PAY someone to come out if I have too. I a very new to all of this so go easy