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How to Install a Reverse Osmosis Water Filter | Ask This Old House

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Plumbing and insulation
By web3d
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Ask This Old House plumbing and heating expert Richard Trethewey installs an under sink water filter that can remove most contaminants
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Time: 1 hour

Cost: $100

Skill Level: Moderate

Tools List for Installing a Reverse Osmosis Water Filter:
Adjustable Open Ended Wrench
Screwdriver

Shopping List:
Reverse Osmosis Filter
3⁄8” x 3⁄8” x 1⁄4” compression T fitting

Steps:
1. Before doing any plumbing work, turn off the water supply at the water main.
2. Mount the filters to the inside of the kitchen cabinet.
3. Remove the hand soap dispenser or side sprayer to allow for a hole for mounting the new faucet.
4. Pass the tubes through the mounting hole and connect them to the faucet base.
5. Mount the faucet base to the sink or counter using the supplied toggle bolt and a screwdriver.
6. Connect the water line to the faucet and attach the faucet to the faucet base.
7. Add the compression T fitting to the existing cold water supply to allow connection to the new water filter. Use a wrench to tighten the connections.
8. Install the drain adapter to the existing drain piping and connect the drain tubing to the new drain adapter. You may need to modify the existing drain piping.
9. Connect the final piece of tubing to the pressure tank and tuck the tank under the sink.
10. Turn back on the water supply.

Resources:
Richard installed the Twist and Lock Reverse Osmosis Filtration System, which is manufactured by GE Appliances (https://www.geappliances.com/) and available at home centers.

About Ask This Old House TV:
Homeowners have a virtual truckload of questions for us on smaller projects, and we’re ready to answer. Ask This Old House solves the steady stream of home improvement problems faced by our viewers—and we make house calls! Ask This Old House features some familiar faces from This Old House, including Kevin O’Connor, general contractor Tom Silva, plumbing and heating expert Richard Trethewey, and landscape contractor Roger Cook.

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How to Install a Reverse Osmosis Water Filter | Ask This Old House
https://www.youtube.com/user/thisoldhouse/

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4-6 minutesAsk This Old HousediyDIY Ideasfaucethome improvementHow To BuildHow To FixHow To InstallKevin O'Connorkevin o'connor ask this old housekevin o'connor housekevin o'connor interviewkevin o'connor this old housekitchenkitchen reno on a budgetkitchen repairkitchen repair ideasplumbingrenovationRenovation IdeasRichard TretheweysinkThis Old Housewater filter

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Comment (0)

  1. My problem with these is that usually, including this video, it implies that the water coming out of this is good healthy water. But it's not, this is a simple solution for when you have a serious issue with your water. But the water coming out is not good, it's pure. Water is a major source of vital minerals and metals, and should ideally not be "pure", if it is then you need to get them from other sources.

  5. Pure H20 implies distilled water, which one should not drink. He should have cautioned her about waiting for for the tank to fill then dumping the tank full of the water and NOT drinking it. Also, if you are in an area with high water bills (Monterey Peninsula, based on consumption) and non-existent summer rainfall, you might not want to throw away that much water. I ran the dump line under and out of my house, about 30', to two large rain barrels, one flowing into another, which hold the water for me to use on my back garden. The plants love the extra minerals and I save about 50 gallons a week.

  7. I have a Apec RO90 Reverse Osmosis system it has a 4 gallon tank. In the manual it says it takes about 2-3hours to fill the tank. I noticed faucet never stops, water trickles endlessly after 1 hour. Is this normal? wouldnt faucet stop after the tank is emptied since it takes a while to fill the tank/filter water?

  8. If your wife is still addicted to buying water bottles, do a blind water test. Give her 4 ounces of name brand water, filtered water, and regular tap water and see if she can taste the difference between the 3

  9. Great Video! We have a American Plumber WRO-3500 system and a 5 Gal. Tank. The tank was about empty in the morning after filling all night. Checked the water going into it and it's drops and not a flow or stream of water. What is the normal flow into the tank coming from the system? we just changed all filter, so they're all brand new. Is there another issue or blockage causing this? If so, where? Thanks!

  10. I want to install a non-RO water filtration system with an alkalizer (similar to a countertop unit) to my refrigerator water line for filtered water and ice. Will this produce good results, and is the filter that’s installed in the fridge still necessary?

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