wrote in message ...

Maybe I am missing something, How do you get the pressurized side to go
slower than the non pressured side?

It sounds like the pressurized water is the cold water supply to the shower
and the unpressurized water is the drainwater, a mixture of hot and cold
water with greater flow. This can be more efficient if the hot water temp
is the same as the shower temp, or you might change the plumbing to run
both the cold water supply to the shower AND the cold water supply to the
water heater through the pressurized side, so the flows are equal. That's
the novel part of the GFX patent.

More likely, the pressurized water is the cold water supply to the water heater. The other way, the shower temp would
change as the pipes warmed up, etc, and special plumbing to the shower would be required.

Bob