Changes in water temperature: hot or cold - the consequences of "Eurorepair"
They made a friend "Eurorepair" - everything is beautiful, expensive-bohato. But there were problems with the water - you wash, adjust the temperature, and hot and cold water flows from the shower head. Although he did not order the installation of an automated contrast shower.
The builders were not at a loss and quickly found a solution - they need to install a thermostatic mixer in the bathtub. It automatically maintains the set temperature. It costs only 10-15 thousand rubles. Against the background of the total cost of repairs, the amount is ridiculous.
Installing a mixer with a thermostat is, of course, a working method. But before the repair, everything was in order with the water - I adjusted the temperature and no changes. We decided to look into the issue.
You look at the plumbing - it's hard to find fault with something - everything is done beautifully and accurately. After some time, they still found the cause of the problem.
It turned out that in the course of the renovation they replaced the old rusty steel pipes on the risers with modern polypropylene pipes. They decided to play it safe so that they would not have to climb there again. After all, a niche with plumbing will be tiled.
They did not take into account only that steel and polypropylene pipes are marked differently. In steel, the nominal bore (inner diameter) is indicated in the brand, and in polypropylene the outer diameter.
It turns out that replacing the fiftieth steel pipe with the fiftieth polypropylene pipe, the inner diameter was narrowed by one and a half times.
If the diameter of the magistrali is narrowed or incorrectly calculated, pressure drops begin when residents open the taps in apartments. It is because of this that your water becomes hot and cold.
Imagine taking a shower. Adjusted a comfortable temperature. And then one of the neighbors discovers hot water. The pressure drops - the water flows from the shower head is barely warm. You adjust the mixer again - you make the temperature comfortable. At that moment, the neighbor finished washing his hands and turned off the tap. Hot water was poured over you.
Probably, the DHW section was on the return line, since the pressure drops and, accordingly, temperatures began already within this apartment. By the way, this problem will also affect the neighbors.
As a result, a friend installed a mixer with a thermostat. He did not dismantle the tiles, disassemble the plumbing lining and increase the diameters of the risers. It will all be too expensive. It is cheaper to install thermostats at neighbors too.
By the way, there are ways to solve such a problem on a budget. For example, install a pressure reducer or thermostatic valve. In this case, you will pay not 10-15 thousand, but about 1.5-3 thousand rubles. We talked about this in more detail on the site.
Please note that after installing thermostatic taps or valves, hot water may be mixed into cold water - hot water will flow from both taps. To prevent this from happening, you need to additionally install check valves. This was also talked about in one of the articles on the site.