questionsdo you run hot or cold water while using the…

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Always cold. The motor in the disposer heats up during operation and running hot water will only increase the possibility of it overheating and thus reducing the life of the unit.

*EDIT
http://www.insinkerator.com/disposers/dosndonts.shtml

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Thanks for the answer (I upvoted), but do you think that the sink water really gets hot enough to cause a problem with the motor due to heat?

Seems fragile for something built to chew up fingers, I mean, carrots.

[edit]
Also, who edited my tags? Stop doing that >:(

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I always run cold because I thought it was conventional knowledge to do so. I doubt the risk of running hot water will heat the disposal so much that it will be on the verge of breaking. Of course, I always limit my disposal usage to a few seconds and only a few items at a time. I figure if you run it for minutes on end and continuously shove scraps in there, that is a different story.

I have always wondered if it's better to dump a bunch of water at one time before using it or letting water run out of the faucet into the sink and disposal on its own.

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I use cool water. Somewhere in the back of my brain I remember hearing that if something is 'greasy' (do not put actual bacon grease there!), that you should use warm/hot water. Don't know if that's true.

Lived quite well w/o a disposal for many years after the old one died. Have found that few things should be put in a disposal. No potato peelings (!!!), cantaloupe rinds, watermelon rinds, corn husks, and on & on. Began to wonder what was permissible. Now have one; it's not used a lot. ;-)

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funny you should ask this. My brother, who is a plumber by trade, and I argued this at length. We both know what the manuals say. His point is this, with most modern sinks becoming insulated, and the newer motors on garbage disposals also insulated, why cold water? Te length of time you would have to run a garbage disposal for it to heat up that much is quite silly.

Now this would also depend on how hot you set your water heater to as well. Some people put their water heaters to make it scalding and other don't

Now, why does the dishwasher manual say to run your water until it is hot before you start the dishwasher, when the dishwasher heats the water?

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Neither; I compost. Not to be sanctimonious, but it uses no water or electricity, doesn't add more stuff to the sewage stream that needs to be processed, and yields "gardeners's gold" for my plants. Also @gmwhit: I put pretty much everything into my composter, including stuff the supposed experts say you shouldn't, like bones, fat and dairy, with no issues.

Anyway, give composting a try if you can! A little tip: check with your local government - many sell high-quality composters at a steep discount. (I got mine through the public works department.)

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once a month I empty my ice cube bin into the disposal and grind away. Local appliance expert said this keeps blades sharp and solidifies room temp grease for it to chunk up and break away. If you ever have cheese bits down in the drain, hot water makes it gooey and stick to plumbing. Cold will jeep it solid so it can be flushed away, no sticky mess.

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Putting Ice in the unit will not sharpen blades in your unit. It will however knock off any hard composite that has stuck to them. More of a cleaning. Also, If u put lemon juice in your ice trays and freeze, it will leave your unit smelling fantastic.