If you have been treating your septic tank monthly with a bacteria treatment such as Rid-X, then it needs to be emptied every five years or so. If not, then it needs to be emptied every one or two...
the people who pump them say every 2 years but most experts on cleaning out grease and sludge say every 4 years just make sure you add enzymes every month like rid-x or even chop meat anything that...