Answer: from the expansion of the pipes to the passage of hot water, which can be eliminated with sound insulation of the pipes.
If you hear noises when you use hot water, and not the rest of the time, the noise simply comes from the passage of the liquid which causes the expansion of the pipes. There is a very easy method to eliminate this little annoyance: install sound insulation on your pipes. This insulation involves replacing the fixing collars of your hot water pipes with anti-vibration collars which are lined with foam, and which will therefore absorb the shock caused by the passage of hot water. replacing necklaces is very simple, accessible to all. No need to call a plumber for this. We find 5 euros each in trade.