When the water started flowing poorly again I realized something was wrong with the water in my apartment.
There was low pressure, and the boiler was giving barely warm water.
I contacted technicians, but everyone gave different explanations — filters.
I searched for clear information. That’s how I found this website: https://stroyka2001.kh.ua
There they clearly explain causes of low pressure.
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 save money on repairs.