I have a question aimed at hot or warm water fed users...........Do you bother insulating your tanks so the temperature is retained in the tank?
I insulated my wfp tank so when I choose to use warm water I know it's not wasted losing heat through the tank.
I have 2-3000 litre of water that is insulated from the sun (when it is out), heating my storage tanks (free of charge courtesy of solar panel heating), so when I return home at the end of the working day I am able to transfer warm water straight into my insulated holding tank in my van ready for the next working day and it remains warm all day long from late spring through to late autumn.