Bought this place last July. It had sat unused for a while before that. Had been rented out. Owner lived in it for a year maybe. So, with this sordid history I feel like I should maybe have the septic pumped just so I know what we're starting out with. Finances are tight, though. Can't afford to pump it right now if it doesn't NEED pumping. I will do it as soon as I have the cash to spare, but at the same time I don't want to mess up the leach field by letting it go too long. How can I tell if it NEEDS to be pumped? There are some green plastic manhole cover things over by the septic alarm/power stand. Also, I occasionally catch a whiff of septic smell outside the mobile home. Could this just be a "burb" from a vent pipe?