In my marine head, I have a Y valve that connects the toilet to either the holding tank or to outside discharge. It is very hard to move the valve by hand. I have used a wrench handle (with the hole) to move the valve. Would this be considered semi-normal? I'm thinking not.Sould I replace the valve as I'm sure it is OME on my '85 Lance 27PS? Or is there a means of lubricating this valve? If it is not faulty in anyway, no need to replace it, correct?Thanks.