That's exactly what an inspection is for. Pumping solves a buildup problem, sludge and scum taking up too much space in the tank. Repair solves a mechanical or structural problem, a cracked baffle, a failed pump, a collapsed line. Sometimes it's both. We check the tank, the lines, and the drainfield before recommending either one, so you're not paying for a repair you don't need or skipping one you do.