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Septic drain field/ dry well concern
We started experiencing problems with our septic a little over three weeks ago. The first indication was "gurgling" from the shower one night. It didn't happen again and all the drains appeared to work okay, so we shrugged it off. A few nights later, the same thing happened. This time, it was a little worst. I could hear the softener/ sump pump was running simultaneously with the gurgling. Also, the shower started to fill with water so I immediately ran down and unplugged the softener and sump pump. The softener, along with the washing machine empties into a sump, which is then pumped into the drain/ septic system. I will be looking to correct this at some point in the near future.
The last time our 1000 gal septic tank was pumped was roughly 3 years ago. Its just the wife and I and we really don't think we use water excessively. Nevertheless, I dug up the access cover the following day to have a look see and that is when I discovered exactly just how full the tank had become. The inlet from the house was submerged in gray water, so the tank was literally full to the top. I arranged to have the tank pumped asap, and we have since replaced the toilet with a ultra low flow unit that uses between 1.1 - 1.6 gals per flush. The septic guy said that he didn't hear any run back from the dry well, that either we were using too much water or there was a problem in the soil pipe from the septic tank to the dry well. For the last few weeks, I have been running all of our laundry down to the laundromat, and there has been no softener output being dumped in. The softener has not been plugged back in since that night. On a hunch, I didn't back fill the septic access cover because I had a feeling that wasn't going to be the end.
Over the weekend, I lifted the cover off once again to have a look. Again, the tank is full to the top. It has only been 3 weeks since the tank was emptied. Looking at the diagram the previous owners left behind, we have a dry well and then a drain field. Does that make sense? When we purchased the house, we were told that the drain field had been replaced 10 years before, so the age of the field is roughly 15? From what I have described, what is my most likely cause of failure? I started digging around the tank yesterday in hopes of finding a clean out for the soil pipe. No such luck. Apparently there is no baffle on the outlet side of the tank either, so now might be the time to take care of this. Any advice you all have is welcomed.