Recent content by RachaelB

The cylinder is full of hot water but something is stopping it getting to the taps as a constant flow. It's not the motorised valve and the HW is on constant so it's not the timer. I'm aware that the water is drawn from the top of the cylinder and that pipe is red hot.

Sorry I should have made it clear that it's temperature. The flow doesn't seem to be affected significantly.

We have a Oso 20 RI cylinder which is supplied by a Vaillant Turbo Max boiler. The system (CH and HW) has been fine for 8 years with annual maintenance. Just recently we noticed that the HW "fades" after a couple of minutes at every tap in the house. The water then runs stone cold. If the taps...