Septic tank pumping is as important as routine maintenance on your vehicle. To ensure longevity and proper functioning of your system, it is recommended you have your septic tank pumped and serviced on a regular basis, every 3 - 5 years. The time between pump outs can be affected by use. If you have a garbage disposal or lots of kids (think extra baths and laundry), your clean out time may be more frequent. By pumping, you are removing the sludge that builds up in the tank before it reaches your drain field. If you notice your toilets or drains are very slow or not going down, you could have a clog, or your septic tank may need to be pumped out.