How To Install a Reverse Osmosis Filter Under a Sink

Installing under-sink reverse osmosis filters is usually done by professionals. Of course, this costs some amount of money. So if you want to make savings, consider installing this water filtration system on your own. It doesn’t take more than two hours to complete and requires only basic tools. This how-to article will guide you through the installation process.

  • Prepare your kit. Reverse osmosis filter is bought in kit. Each kit should have reverse osmosis unit, storage tank, filters, hosing, and valves, among other things. Before starting the installation, make sure that all parts are in the kit. Also, prepare the tools you will need, which include drill, drill bits, wrench, and screwdriver.
  • Clear the sink. The area where you should put the system should be spacious. So make sure to remove everything from under your sink to give the reverse osmosis system more room.
  • Install the faucet. The faucet should be inserted to a hole. Your sink should already have a hole. But in case there is none, create a hole using a drill. Then, position the faucet in the hole. Tighten it down from under your sink. Make sure the faucet is tightly held in place.
  • Connect the system to the cold water line. You can use the saddle valve in doing this. Put the saddle valve on the cold water line. Then, connect the saddle valve to the hose attached to the reverse osmosis system unit.
  • Prepare the waste water line. First, make a hole on the pipe of the drain assembly. Then, put a valve over this hole. Attach drainage tubing on the valve and tighten it using a wrench. The other end of the tubing should be connected to the reverse osmosis unit.
  • Position the storage tank and filters. Bring the storage stank and filters under your sink. There should be enough room to accommodate these parts. Then, connect the lines of the storage tank and filters.
  • Start the system. First, you need to turn the storage valve off and turn the cold water line on. Check if there are leaks. If there are, find out which needs to be tightened. Now, turn on the reverse osmosis faucet. It may take 10 to 15 minutes before water actually begins to flow out. Expect the first drops of water to be in black because of the carbon content. After 10 to 15 minutes, turn the faucet off and turn the storage tank on. For 4 to 10 hours, just allow the tank to be filled. Make adjustments if you see any leaks. Then, turn the faucet on to drain the water. You need to make several drains before water is safe to use.
  • Make necessary system updates. You need to check your system for leaks from time to time. Replace the membrane after six months; filters after two years.

Remember that this is only a general guideline. Your reverse osmosis system comes with an owner’s manual that has complete and detailed installation instructions. It has care and maintenance guidelines as well.


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