When the water started flowing poorly again I realized something was wrong with the water in my apartment.
There was very weak flow, and the boiler was giving almost no hot water.
I contacted local specialists, but everyone gave different explanations — old system.
Then I started looking for answers. That’s how I found this website: https://stroyka2001.kh.ua
There they clearly explain plumbing mistakes.
After reading a few articles, I understood why previous repairs didn’t help.
It’s a useful site for home issues to anyone who wants to get clear explanations.