What to look for in case of poor water pressure. History of one renovation

Occasion at work

I came to the hostess to clean the boiler, as the hot water did not go well, she decided that the problem was in it. In principle, the water heater had to be cleaned in time, but the problem was not in it.

When disconnecting the pipe supplying cold water to the boiler, and a test supply of water, a weak pressure was found. I closed the pipe with a plug and checked the pressure in the kitchen, everything is normal, and even in the bathroom, when cold water was turned on, the pressure was normal.

Cause

I started looking for the reason, it ended up in an iron insert, between the brass corner and the fitting. Those who changed the pipeline to metal-plastic left a delayed-action mine in the form of this adapter.

When trying to unscrew it, it fell off, the thread was "eaten" by rust. And they made the insert, either to slightly lengthen the section (there was not enough pipe), or because there was no fitting with an external thread. But these are my assumptions.

Corrosion made its way inside, it grew on the walls and narrowed the passage for water, there was not even a gap, hence the weak pressure. I had to change this section, after which the pressure returned to normal.

I'll tell you right away that already wrotehow can you find the problem of low water pressure, method consists in "dividing" the section of the water supply system into parts, and thus, to narrow the search area to a complete solution to the problem.

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