Does anyobdy know any consumer appliances that contain a water driven impeler of hydraulic cylinder?

[Peter]

For a project I am looking for a cheap consumer water hydraulic driven mechanism such as a water driven impeller or water hydraulic cylinder.

I have been thinking along the lines of those lawn sprinklers that slowly sweep a spray back and forth. I guess they contain some kind of water impeller but perhaps a little lightweight for my purposes.

Can anybody here think of someplace they have seen a water powered impeller or cylinder in a cheap commercial application. I can then buy the item and cannibalize it for the mechanism.

[Sparks]

A water meter?

I think some water softeners use the mains water to make them work too.

Sparks...

[David Lang]

What about those cheapo pumps you power with your electric drill? In reverse of course.

Dave

[Andrew Gabriel]

There's a car wash brush for fitting to pressure washers, which uses the pressure to spin the middle section of the brush.

[dingbat]

Water meters use a nutating disk, not an impeller. Good accuracy, but negligible torque available.

[Peter]

Ah, that sounds about right as there is clearly enough torque to rotate the brush.

[Andrew Gabriel]

Only just, and thats after gearing down the revs (and hence up the torque). I doubt there's more than a couple of Watts power driving the brush, which is pretty bad going considering there's 1600W pumping the water in the first place.