The sewage system clean is a little capped pipeline jutting above the ground. Unfortunately, locating it is not always easy.
https://remingtonqteb599.wordpress.com/2022/01/11/why-you-should-spend-more-time-thinking-about-%ce%b1%cf%80%ce%bf%cf%86%cf%81%ce%b1%ce%be%ce%b5%ce%b9%cf%83-%cf%80%ce%b5%ce%b9%cf%81%ce%b1%ce%b9%ce%b1%cf%83-24-%cf%89%cf%81%ce%b5%cf%83/