Our home has a 1750 gallon septic tank. It's just me and "Bubba Can Dance" that live in our home, but it's probably more like 4 people occupy our home, with kids and guests coming and going on weekends. We've been in our home almost 5 years now and have never had the tank pumped. The drains show no signs of needing to be pumped, but I was wondering if we should have it pumped before it starts needing it. How often do you have yours pumped?