How to organize a sewer in a summer house for 5 people?

Good day, Elena. Depends on many factors.

Priority:

1. Ground water. If your site is high (the signs are the formation of small lakes), choose a horizontal model.
2. Volume depends not only on the number of people living. It is important whether a bathtub, washing machine and dishwasher are installed. All these nuances should be considered in conjunction.
3. Soil water absorption. At low rates, a larger well should be equipped.
4. The presence of a ditch. Septic tanks of deep cleaning allows you to bring the waste pipe directly into the ditch. In this case, the soil water absorption factor and the height of the groundwater will not affect your choice.
5. Budget. The market is represented by low-cost cottage models with low cleaning and small volume until complete control of electronic components.

I would advise you to consider the option of a septic tank “Tver”. It has a horizontal shape, works by natural overflow. For the winter, it will be necessary to turn off only the pump and compressor. You can read more about them in this article. Budget options are presented here.