water impellor direction

[Destroyer]

Originally Posted by Blue_Runner

Probably the same reason we don't have permanent light bulbs.

Did you know there's a light bulb that has been burning almost continiously since 1901 in a firehouse? It's in Livermore, Ohio and has been the subject of several researches, investigations, and documentations. It started out as a 60 watt bulb and now burns as a low (4) wattage bulb. It doesn't give out much light, but even still... 110 plus years......
(And I have a 6v high intensity night light on my night table that I put a 12v automobile bulb in...that bulb has been on continiously for the 27 years we've been living in the house. It's not a lot of light, but works just great as a night light). Obviously the trick to long life for a lightbulb is the burn it at a lower wattage than it was designed for.)