Ice maker hookup to hot water

No disrespect to old wives intended. The reasons not to are; valves in the refrigerator are not rated for high temperature, water in a hot water tank tends to have an off taste due to sediment build-up, ice takes longer to make, introduces unnecessary cooling load in freezer compartment, carbon filters on the incoming water line will encourage mold growth Can't really think of any more right now but there likely are. Find all posts by GregH. Have never heard of anyone doing it but have heard numerous arguments that hot water freezes quicker than cold water.

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Won't go there though. I would not do it for one simple reason. Water heaters have concentrated "things" like metals and in some cases bacteria.

Ice Maker Is Tapped Into The Hot Water Line - Plumbing - DIY Home Improvement | DIYChatroom

They always heat it. Gary Slusser our resident water specialist here at DIY told me all this. Find all posts by majakdragon. I "do" water for a living. There has been much debate on this recently. It all comes down to this: If you feel comfortable drinking the water out of your hot tap, then you can use it for ice. If you don't, not only don'y use it for ice, but fix the problem. Certainly, if in a rental or on city supply your options may be limited.

Hot water for ice maker???

All water entering the house has both dissolved gases and suspended particulate in the water. The cold water is used much more often than the hot, so the water in the cold lines is "fresher", thus more "contaminates" are in it. The hot water is used much less, thus spends more time in the loop before discharging through a faucet. When the hot water is heated in the tank, as it heats it gives up disolved gases.

As it sits in the tank, some suspended particulate also drops out and settles in the bottom of the tank. At a basic level you could consider the hot water to be "cleaner" than the cold water.


In my house, the ice maker is tapped into the hot water line with a run of copper coil tubing. By the time the water from the hot water line gets to the freezer, it is already at ambient temperature. In addition, due to the small volume of water used in making ice, I'm not really wasting tremendous amounts of oil to heat water that will eventually be frozen. The cubes made from the "cleaner" water from the hot water line will be clearer, and if you have chlorinated water, will have lost that off-taste.

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Once again, you'll not be pumping degree water into your freezer. By the time it hits the freezer it has lost it's heat. If you have a recirc pump, it may be higher than ambient temp but maybe not by much. If indeed the water from the hot line is entering the freezer at near-ambient temp, you may also get ice slightly quicker as the clean water, with less contaminates, will have a slightly higher freezing temp.

Gents, as always, MHO. Do I risk disagreeing with the mighty Mongo The water in the heater isn't very clean, I've heard many many times. Most folks don't flush their water heater often enough. If you haven't go drain a gallon into a plastic milk jug and tell me what you think.

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What I got out of the heater at a former rental apartment -- ie, never maintained -- looked like chocolate milk, or Charles River water, if you're in the know. The cold water is used more and has less time to breed critters or soak up lead that may be in your old solder. Eg, the EPA recommends: Hot water is likely to contain higher levels of lead. The two actions recommended above are very important to the health of your family.

They will probably be effective in reducing lead levels because most of the lead in household water usually comes from the plumbing in your house, not from the local water supply. Particulates should be filtered out before hitting the ice maker.

see If your water is over-chlorinated ours is, a bath smells like a public swimming pool then filter it before it goes into the ice maker. They make inline filters just for icemakers, don't know if they're any good.

Most people would install one and forget about it until the refrigerator breaks 20 years later. Note that almost all water filters are designed for cold water.

hot water for ice

Being a lawyer, gotta have more citations: Whirlpool for one offers refrigerators with built-in filtration. You can buy a brass reducing fitting that will solder onto the one half inch pipe leaving the ball valve and uses either a compression or flare fitting to adapt the smaller one quarter inch tubing to the one half inch pipe. These fittings are readily available at plumbing supply stores, hardware stores, or home centers. I have also heard that hot water freezes faster than cold water. But I have always doubted it to be true. So I ran a controlled experiment on your behalf.

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I filled three identical glasses with three ounces of water. One glass had cold tap water, the other had room temperature water and the final glass had steaming hot tap water. The cold tap water and the room temperature water froze at virtually the same time. The hot water was very cold but not yet frozen. However, I wanted to point out that this urban legend is indeed derived from fact. If one were to boil water and let it cool back to room temperature, and then put it in the freezer at the same time as room-temp water fresh from the tap, the boiled water would indeed freeze first.

This is because in the process of boiling, you are evolving a lot of air out of the water. So, the boiled water, which has less air in it, freezes faster. It is really a moot point. Even if you do connect the ice maker supply line to a hot water line, the hot water would never make it to the cube tray. The volume of water inside the coiled length of one quarter inch tubing behind or under the refrigerator has been at room temperature for hours.

This water is often a sufficient volume to fill the tray. Even if hot water was better, just as it got to the refrigerator the automatic ice maker valve would stop the water flow. However, according to an EPA report EPA F , it is recommended that only cold tap water be used for drinking, cooking and making baby formula.