Insulate the pipes with the dark grey foam insulators. Keep the hot hot and stops the condensation on the cold in the summer
For the circ pump, there is a system that goes under the sink and runs water from hot to cold and stops when the hot water gets there. It starts with push button or motion detectorora or timer.
It really does save that water and adds nothing to the heating bill. There was a post about here about 2 yrs ago.