If you should or shouldn’t get your tanked pumped is a bit like onions or ogres, there are layers too it. There’s layers in your septic tank too, the most important is the layer of bacteria that decomposes the rest of the stuff. Sometimes you could have a big tank with a healthy layer of decomposition, in that case, you may never have to call us out to pump your system. On the flip side, you could have a smaller tank and have an unhealthy layer of decomposition, in that case it is recommended that you pump at least once every 3 years. This is because when it comes to your septic system, its better to be safe than sorry (you probably know why, ?).