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There is a four inch pipe up the side of your home, the vent pipe.
At the bottom of this pipe is the sewage pipe to your septic tank, dig along the pipe, follow it until you find the septic tank....

Your drainage from the kitchen sink is connected to the main sewage line to the septic tank, there will be a number of water tight connections along these pipes.
The water in your waste and sewage...

Harold,
Thanks for the picture, it's a long time since I saw one of those in Normandy.

As Tom writes, the water is not getting away fast enough, probably because the ground is already full of water. Dig a hole near the drain field to see how high the ground water is. The water should...

speedball1 is correct, the drain field is not working, however, it is not that the water is rising from the drainfield, it is that the people in the home are continually flushing the toilet and using...

Lets look at this sensibly. When a septic tank and drain field are correctly installed, the drain field is below the exit pipe level from the septic tank, and indeed the pipe are angled down at 1 in...

As you are close to the centre of town and only have a small yard, it is unlikely that you have a septic and drain field. Drain fields take up a fair bit of space.
However, it is an old property.

Salt is an antiseptic, it does two things to damage your septic and drain field.
One, it kills the microbes that you need to convert your toilet into carbon dioxide and methane gases, that means the...

The inlet pipe is the highest and there should be a few inches of space between the bottom of its T and the top of the floating crust. This to create as little turbulence as possible when the water...

You need to start at the beginning.
After doing a percolation test it becomes clear how absorbent the ground is and what size drain field the property needs for the number of people living and...

A septic tank is full when the compacted solids are within 12 inches from the bottom of the outlet T.

To ascertain the level of the compacted solids lower a pole down the inlet T and feel the top...