Connecting the Ice Maker and Water Supply Valve in an LG Fridge

Updated on April 6, 2016

My Qualifications

I've been in the do-it-yourself business for over 20 years, and have worked for schools, businesses, and homeowners. In addition, I have organized seminars to teach and offer hands-on experience to homeowners and hardware employees alike. Check with your area's building code before starting any job, and always seek professional advice if you feel the level of workmanship is beyond your capabilities.

Connecting the Water Line to Refrigerator

When you are replacing an existing refrigerator that already has a water line hooked up, that makes your job a whole lot easier. But when you don't have a supply line or pipe near by for your ice maker and water dispenser, it turns into a more detailed, lengthy and challenging process.

You need to find out a few things before you start your project, in this case we'll be using the LG refrigerator - other appliances may be similar, but you should double check the line hook-ups in the rear of your fridge. Here's a few things that I will cover on this hub:

  • Home project planning
  • What type of plumbing pipe connections
  • Locate where your nearest water line is
  • Connect your LG fridge to water supply
  • Enjoy the fruits of your labor

Draw out your Plan


Home Project Planning

First things first, all projects start with a plan, and whether on paper or in your head, a plan is always needed to save you from wasting time and money. Locate two water supply areas that are near to your refrigerator that you can run a supply line from it to your LG refrigerator. It may be a pipe that runs below the deck, or the kitchen sink that is 10 feet away separated by counter space.

Draw out on a piece of paper, what your path will be for each line, and all necessary fittings and valves for the run. This will make it easier to see what your parts list should be to save you from driving back and forth to the hardware store. Choose one of the routes that you will be more comfortable handling.

Tools for the Project:

Soldering list for rigid copper pipes:
Push-on fittings list for rigid copper pipes:
Compression fittings list for flexible copper or plastic tubing:
Map gas cannister and tips
Pipe cutter that can also cut 1/4 pipe
2 Adjustable wrench
Pipe cleaner or sand paper
Pipe cleaner or sandpaper
Pipe cutter that can also cut 1/4 pipe
Bucket to catch water
Multi-tip screwdriver
Non-lead solder
File or sand paper to de-bur pipe cuts
Pipe cutter
Bucket to catch water
Bucket to catch water

Know your homes pipe type.

Do you have PVC, Copper, or Galvanized pipe supplying your home with water?

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Push Connect Fittings

Type of Plumbing Connections

Next, decide what type of tools you will need to get the job done, and it should depend on the type of connections that you will be using. If you will be soldering your joints to copper pipe, you'll need a lot more material. If soldering, you will be soldering copper pipe straight up to the fridge eliminating a large chance of leakage that most other types of connections bow to eventually.

If you are not soldering your joints, you will be using compression fittings, or the push-on fittings that connect directly to the copper supply piping. With push-on fitting you will copy the route of soldering, and bring your copper pipe right up to the fridge. Compression fittings will utilize a saddle valve off of a copper pipe source (make sure it is a the cold water source) and bring water to the fridge with a flex line. This flex line can be copper, or plastic like the ones that come in a refrigerator water installation kit - these can be picked up at the hardware store, and they should have everything you need including the saddle valve.

Water Line Installation Video

Water that tastes good

Many feel that plastic supply lines to refridgerator dispensors adds a bad taste to the water. Most prefer copper supply lines because of this.

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Locate Where Your Nearest Water Line is

In most cases, your nearest line will be under your kitchen sink, or another pipe source near-by - usually under the floor in a basement. Whether you will be using a saddle valve for flex line or soldering, this would be a great time to make sure that the water supply is turned off. You can also drain any excess water in the line by turning on any faucet below this point in the water line to ensure that all the water is out of the pipe before you cut or pierce the water line - use the bucket to catch any water.

If soldering your line, cut the existing pipe and ensure that you have enough flex to slip in a tee so that you can branch off your line to the fridge. For flex lines, install your saddle valve and drill through cabinets or joists to run your line to your fridge. You will run your line through a hole in the floor directly behind your fridge. Be sure to watch that there are no other pipes or electrical lines before you drill.

Feed your line up onto the kitchen floor. If you are soldering, install a 1/2 x 1/4 inch valve so that you connect your line directly to the fridge. If running a flex line, you may consider installing a 1/4 x 1/4 inch valve if getting to the saddle valve is a hassle. You are almost done!

Connect your LG Fridge to Water Supply

If you have a shut-off valve installed behind the fridge, test and check for water leaks at this time. Inspect all joints, and valves for any leaks. Make necessary adjustments to valves and joints and ensure that there are no leaks. Leave about a six to eight foot of line coiled in back of the fridge so that you'll have an easier time whenever cleaning behind the fridge.

Our final step will be to purge the pipes. Using any line that will be hooked directly to your fridge, run about two gallons into your bucket to ensure that any debris left in the pipe is now out of the pipe. When this is done, ensure that your fridge is not plugged in, and make the last hook up to your fridge, and once again, check for leaks.


Enjoy the Fruits of your Labor

Plug in your refrigerator and check your manufacturer's manual for flushing your dispenser's filters once you have completed the hookup. Once this is done, fill a glass, and enjoy the fruits of your labor. There is nothing more refreshing than water, and when it's readily available, cold and filtered, it only makes it convenient for you to keep your body well hydrated. A well hydrated body is not only healthy, it's beautiful!


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      Kerry 3 months ago

      Can we use the new fridge if the water isn’t plumbed in

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      pmcha 6 months ago

      I currently have a copper line coming thru my kitchen floor behind the refrigerator, and a shut off valve for the line in my basement. I want to connect this line to the plastic tubing on the back of my refrigerator so I can activate my icemaker. Do you have instructions for this? I've never done this before, but I'm sure I can do it with some clear instruction. Thank you