I have a 1987 Hunter 34'. I am having some leaking problems on some of the hose coupling and T-fittings. In addition, I can't seem to identify the size of the tubing. I have checked with RV supply stores and they can't seem to help me. If I could get the size of the tubing and a resource to purchase hose and fittings like couplings and T-fittings that would be great.