Water in the shaft of the lifting system

Hello,

I am sorry to hear that you are facing water damage in your dream house. It is understandable that you are concerned and looking for solutions. Based on your description, it seems that there may be a problem with the drainage in the basement.

It is not normal for water to stand in a pit in the basement, especially if it is a room containing water usage appliances such as a washing machine, shower, sink, and toilet. It is important to determine the cause of the water ingress and take appropriate measures to prevent further damage.

Since you suspect that there is a lifting system in your basement or at least a backflow valve should be present, it is advisable to consult a professional for inspection and repair.

Regarding the slow drainage in the other drain pipe, this can also be a sign of a drainage problem. A cleaning device could help to clear blockages, but it is important to proceed carefully to avoid causing further damage.

Hello everyone,
first of all, thank you very much for the active participation here. I would like to give an update to possibly help others who are in a similar situation as I am.
I was able to prove that somewhere in the sewage pipe there is a leak. I discovered this by closing the backwater valve and filling the pipes with water. I was able to observe the water level in the pipes at the floor drain. I filled it up to about 10 cm before the overflow, waited an hour to ensure that the water in the system was no longer sloshing. Then I hung a folding rule inside and checked hourly whether the water level decreased. The water level actually dropped by about 3-5 mm per hour. Additionally, it started dripping at the sleeve in the Staufix shaft. After performing this test a second time and achieving the same result, I was able to prove that there is a leak in the sewage system.
Therefore, I hired a company to carry out a camera inspection and flush the system. Only slight, soft deposits were found. Otherwise, the sewage system in the basement looked almost new, which made my repair efforts more difficult because I did not know exactly where the problem was.
The suspicion was that either a seal was forgotten during construction or damaged during installation. Since the sewage system has many branches and a length of about 27 m, only the flooding method was an option to seal the leak. Another company came to us and carried out this procedure with two components.
On the same day the procedure was performed, the company conducted a tightness test. They proceeded exactly as I did, with the folding rule and sealing the system, and filled the water level. After two hours, no movement of the water level could be detected and no more water leaked from the backwater pump shaft.
In the following days, I conducted an identical test for three hours. Again, the water level remained completely constant without decreasing further. I regularly measure (still manually) marked wall spots with a capacitive moisture meter. Here too, I can confirm after weeks that the moisture levels have dropped everywhere.
However, I remain skeptical. It is possible that we do not have just one but several problems in the house. My next step is to professionally dry the screed and carry out core drilling for this purpose. I will be looking for a company that offers this service.
If you have any experience with this, please feel free to write. At the moment I am drying with a household drying device and some electric heaters. The electric heaters consume a lot of electricity, but I only do this when my battery from the photovoltaic system is fully charged.