I have a Westwood filter on my oil tank. Seems to be leaking a little. Does this happen if the filter gets old/clogged? I am sure I could change it myself. I believe there is a removable element inside the container? Does it screw off? Also it seems like there might be 2 shutoff valves in the line? Actually, it looks like it's coming out the top. There is a screw with a jam nut,is that a bleeder screw?