I lifted one of the manholes to the septic tank yesterday. I wish I hadn’t!
The drain to the tank was blocked and the content backed up the drain. I filled a dustbin with water using a hose and put that down the manhole in the hope that it would flush out the blockage. No luck.
There was nothing else for it other than to use a set of drain rods to clean the blockage. Not a nice job. I will save you the pictures, but it is safe to say the problem is now resolved. It took a while for the back log (no pun intended) to completely clean as it had backed up a long way.
Although it doesn’t look like the septic tank is full, we don’t know when it was last emptied. I have arranged for it to be emptied on Friday and then at least if we get more problems it will not be because the tank is full. Ho hum.
I will save you from the photos of the inside, but the blockage has now been removed. Phew! Notice that this now has proper manhole covers rather than the homemade covers.