It's been 4 months since we moved in to the newly constructed house and the septic tank is quite large (like 10 feet length, 6 feet depth and 8 feet width).
Water seems to be backing up in the toilet bowl and takes a good amount of time to drain at ground floor, and the toilet makes some noise as well.
Please look at the videos I have linked here.
- The Septic tank has open bottom with the ground
- Toilet 2 in the video is actually on top of the septic tank
- Toilet 1 is 50 feet away from the tank
- Toilet 2 drains bit faster than Toilet 1
- Once a month, I drop Bio-Septic cleaning liquids into the toilet
- I checked out the air vent and it's fine.
My building engineer told me that there's no way the septic tank can fill this fast.
EDIT: I opened some couple of caps at Septic line's elbow and water started overflowing.
These elbows are like 2 feet high from ground which I'm really surprised how come water went up to that level.
In order for water to come up to this level ,Septic tank should get filled up completely then water will go up in the septic line.
I had to use 5000L septic tank cleaning truck twice to pump out all the septic sewage.
I'm worried whether the roof of toilet might cave in ?
How many times in a year I should be pumping out the septic tank ?
Any affordable solution is appreciated.