Both... i found that BW recomends you replace the belly tank every 20 years..
Mine, made of alum. had pin holes all in the under side.. a pressure test with belly full of water showed bubbles.. and then when we got it out, it was like bird shot all to the bottom of the tank. I hope to have a new, plastic tank soon... but if it lasts 20 more years.. it will be someone else's problem. 🙂 I was getting water in my gas at an alarming rate.. had to be this after several attempts to hope it was something else. the wood over the tank and under the flooring was rotten as well. still working on that final fix.. I have a customer in Greenville SC that makes fiberglass board material.. and i hope I can get a solid slab of it cut to size and shape to eliminate future rot from wood.
