Physics buffs: drain pipe turbines

[Hawk Tuah]

Still wouldn't save money it would cost to set up, plus it would clog the blades. waste water has solid bits in it.

Depends on the type of blades. If you have a water wheel type of setup then that wouldn't get clogged.

 

[monkeysmith]

If you had an unmetered water supply, could you leave the tap on the power your drainpipe turbine?

Not the best solution for the environment granted, but could save a few pennies on the electric bill???