Control of circulator via smart socket with remote control, 2 locations

For a circulator, you may want to think about periodic operation all the time rather than manual switching. A simple timer relay would be sufficient to switch on the pump for, say, 2 minutes every half hour.
However, if you absolutely want manual switching, I would suggest various types of Wifi relays that work with Tuya. You can switch on from your phone, you can permanently program the functionality in the app as I described above, and you can buy remote switches that also work with Tuya. There are many options - a relay mounted in the socket into which you plug the pump plug, a box model, for the switchboard. There are also a number of switches, from models that are mounted instead of a switch, to ones that plug into sockets, to various battery models that may look like a wall switch but you can stick them to the wall anywhere. Plus the necessary lithium batteries (sticks or flat watch batteries) and you can expect 2-3 years of battery life.

78db78 wrote:

Because there you have a better solution with temperature measurement on the pipe.

There is also the issue of the quality of the lagging on the pipes in the author's installation, and how quickly these pipes cool down. They can cool much faster in the walls than on the wall at the sensor.

Cragmite wrote:

Periodic switching for X amount of time proposed above is a poor idea in my opinion, as it will generate large losses when not needed, even though the pipes are insulated. Although from a utility perspective it will be most convenient.

So why is this the solution used most often?
@Tombo55 and tell me more, what do you heat the water with?

Tombo55 wrote:

Heat pump since August and with circulation on from 6am to 10pm - power consumption 150% higher was.

Wait a minute. You've had the heat pump since August, which means you've only received one electricity invoice since installation, and you see the increase in electricity consumption in the circulation and not in the fact that the pump was installed? Did you know that the pump itself consumes a great deal of electricity?

Tombo55 wrote:

Tracing the consumption shown on the sub-meter from the hot water heating pump in August with circulation on and in September with it off - I draw conclusions and ask.

And is it not the case that in September it is colder than in August, so that the house cools down faster and the heat demand increases, plus the COP of the pump decreases by the low temperature outside?