How to Install Your Own Reverse Osmosis Home Water System in 10 Easy Steps

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by Anna Butros
(London, UK)

You have already decided that now is the time to install your own home reverse osmosis system. If you are hoping to skip the additional costs associated with paying a contractor to install the system for you, the answer is yes!.

You absolutely can install the system yourself, and you can save about three-quarters of the cost of the system by doing so. Additionally, by installing the system yourself, you are going to become familiar with how it works, and be able to do maintenance on it on your own, saving money by not having to make service calls.

It only takes a few hours to complete the job, so here is your quick and easy guide to getting the job done on your own.

You Will Need: 

• An electric drill
• ½ inch drill-bit for mounting the faucet
• smaller drill bits for installing the wastewater line
• Teflon tape for sealing connections
• A flashlight for working under the sink
• Towels and sponges to clean up leaks

Steps to Install Your New Reverse Osmosis System:

1. Read all instructions that came with the system thoroughly to ensure that you don’t need any additional water softener systems
2. Put everything you will need close to the kitchen sink, where you will mainly be working.

3. Remove the reverse osmosis system from the packaging and ensure that all of the parts are there. Many systems will come with the filters already assembled together, except for the reverse osmosis membrane, which will come in a sealed package that shouldn’t be opened until you are ready to assemble it.

4. Take everything out that is being stored under the kitchen sink and put it in a safe place inaccessible to children and small animals. Check for clearance on the underside of the sink for the reverse osmosis faucet, to one side of the regular sink fixture, and then drill your hole.

5. Install and tighten down the faucet, and then attach a length of the plastic water line and tighten. Be sure that the faucet is secured, because once the filters and the tank are installed it’s hard to access it.

6. Turn off the cold water supply valve. Attach the saddle valve to the cold water line going to the faucet.

7. Next, attach the wastewater line and the valve by drilling a hole in the drain pipe. Install the valve over the hole. Install plastic drain line into the fitting on the valve and tighten it up.

8. Assemble tee and elbow fittings to the system filters and tank. Place the bank of filters close to the front of the cabinet under the kitchen sink for easy access and attach the lines.

9. Check the system over. Slowly turn the cold water supply valve on until it is about halfway open, and, as the filters start to fill up, check for leaks. Open the reverse osmosis faucet, allowing air to purge from the system.

10. When the filters are full of water, close the reverse osmosis faucet. The reserve tank will start to fill. Flush the first tank of water made by the system.

Good job! Your reverse osmosis water filtration system is now installed and ready to go, and you just saved a ton of money by taking care of it yourself.

Updated: September 6, 2016 — 3:04 am

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