I know whats wrong with your oil burner as I have had to change that part a few times. Now I switched to gas. Under my boiler, washing machine, sinks and a few other places I installed leak detectors. If those sensors get wet, the water main shuts off. I put that in 2 years ago because my wife and I were going out and I said, what is that water running noise I hear? The stainless steel flexible connection to a kitchen sink burst in half and water was pouring out and running through my ceiling tiles into the finished basement. If we had left, I would have had a foot of water in my house. The next day I installed that system.