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hawks81 07-11-2010 10:54 PM

Ice maker is tapped into the hot water line...
Is that normal? Obviously you would think you would use the cold water to make Is hot used possibly so the water doesnt freeze prior to reaching the ice tray thus clogging the water line?

cbzdel 07-11-2010 11:12 PM

i have never seen it.. but in my opinion it it would be fine.. 99% of the time the it would never even see hot water.. I mean the ice tray takes what a 1/4 of a gallon at the most, I am sure it takes more than that for the hot water to reach the faucet. The only time you may get hot water if if you are doing dishes or cooking or something and the water in that line is already hot once the freezer kick on.

It may have just been easier to tap into that line?

But again I see no problem with it.

Mike Swearingen 07-11-2010 11:47 PM

I have heard of people deliberately tapping an ice maker water supply into a hot water line because there is a theory out there that says that it "freezes faster than cold water".
I don't buy that, but I have seen it mentioned from time to time on various DIY sites. Pesonally, mine has always been tapped into the cold line.
I agree with cbzdel. It really doesn't matter that much. You're going to get cold water out of the end of a hot line at first probably almost all of the time that the ice maker calls for it. Not worth changing.

COLDIRON 07-12-2010 06:34 AM

I would never leave a ice maker tied into a hot water line Why? It just does not make sense and it's wrong. Cold water only change it. Quite a few people out there think hot water freezes before cold water ..Wrong cold water freezes faster facts are BTU ratings. Cold water is already ahead of hot water because you have to lower the temp to start freezing process it takes less time to lower cold water temps than hot water.

By the way that was a very good question.

hawks81 07-12-2010 06:55 AM

Thanks for your helpful advice! I agree with everything all 3 of you have said 100%. I just wondered if there was a reason someone would have done it and a frozen line was one thing i thought of. Obviously if you guys have never seen it then it's not normal.

The only other thing I could have seen as a reasonable thought would be that hot water has less minerals in it than cold water (I maybe be wrong) and therefore would keep the ice maker a bit cleaner from mineral deposits?

McSteve 07-12-2010 07:23 AM

It's probably not a big deal, but around here at least (Minneapolis, MN), we're told to consider hot water as almost non-potable, especially for children. Something about hot water having more lead leeched from solder joints, and other badness from sitting in the tank. We've always been told to only use cold water for drinking/cooking, and to let it run for a while to get water that hasn't been sitting the pipes.

If it were me, I'd probably try to move the icemaker tap to a cold water line. Something about freezing hot water just seems... inefficient.

drtbk4ever 07-12-2010 11:17 AM

Actually warmer water can sometimes "Begin" to freeze faster than colder water. Read attached Scientific American article.

Whether this applies to your icemaker is anyone's guess. But personally I would prefer to see it connect to the cold water line.

COLDIRON 07-12-2010 11:43 AM

Never happen in a standard environment , it's just a couple wacky Scientist writing Baloney.

drtbk4ever 07-12-2010 12:32 PM

Wow, nice post.

beenthere 07-12-2010 01:00 PM

Lets be considerate to all members.

COLDIRON 07-12-2010 01:05 PM

changed answer, desired not to reply with what was written. Sorry to ofend you.

beenthere 07-12-2010 01:07 PM

Some guys do tap into the hot water line under the though that the hot water will have left alot of the waters sediments in the water heater tank. Which in turn will alow the water to freeze faster. Since minerals/sediments, have the tendency to slow down the freezing process.

Take 2 glasses of the same amount of ROOM temp water. Add 1 teaspoon of salt to one of them. Put them both in the freezer. Check in 30 ,minutes. And you will see the one with salt in it isn't freezing/icing up yet. Depending on how much salt. The water must drop to a temp of 20F to freeze.

But, tapping into the hot water line to freeze faster also won't work just because its hot. Since the water in the water line will cool off to room temp while the maker is making ice, and either way, most of the time you end up with room temp water going into it.

COLDIRON 07-12-2010 01:15 PM

The salt works the other way around in a glass full of ice and water.. put thermometer in the glass of ice and water until it reaches 32 deg then start pouring salt in and it will go below 32 deg. due to the quick melting of the ice and evaporation.

beenthere 07-12-2010 03:35 PM

Has to have ice for the salt to melt. To lower the temp quicker.

Thats how we made ice cream a long time ago.

Remember, water freezes at 32F. And ice thaws at 32F.

There is only 144 BTUs difference between a pound of 32 ice, and a pound of 32 water.

rjniles 07-12-2010 05:02 PM

When I re-plumbed my house last year with PEX (had PB), I purposefully connected my ice maker on the hot side.

Here is my rational:

The ice maker will never actually get hot water as the piping is too long.

I have a well and very hard water, lots of iron and calcium. With the icemaker on cold water I used to get very cloudy ice. Now the water heater precipitates out some (or a lot) of the minerals and my ice is clear.

The lead argument for me is not a consideration as I have no copper or solder in my system.

Works for me.

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