3. Cons:
The water loses heat as it travels through the house and
must be heated up again
Studies show that people only use hot water 5% of the time
yet the line is hot all the time - high waste of energy
Most leaks happen in the hot lines with circulation pumps
How can the cold line be used to move cool water back to
the heater?
4. If a circulation pump is installed on or near a heater on the
hot line out in to the house and a bridge valve, or crossover
valve, is under the farthest fixture a continuous loop is
established.
Hot and cold water are pressure balanced in a home. The
pump helps the hot side overcome the cold side.
Once hot water reaches the bridge valve the valve closes so
that no more water can be pushed into the cold line and
the large syringe pump shuts off.