Home Maintenance | Kitchen

Installing a Reverse Osmosis Water Filter

In the vast majority of countries, environmental protection agencies or other relevant bodies set regulations to control the level of contaminants in tap water, including those suspected to be present under the unregulated contaminant monitoring rule. However, a new study led by the researchers from the University Nebraska-Lincoln is raising new concerns about the quality of drinking water. As a consequence, it does not come as a surprise that many people decide to use water filters.

reverse osmosis (RO) water filter
APEC – Premium 5-Stage Reverse Osmosis Drinking Water Filter System

When it comes to installing a reverse osmosis (RO) water filter, you should know that all RO water filters work the same way. They all have the same basic components and the installation of all water filters is more or less similar. The real difference lies in the quality of the filter and membrane.

The location of major components

A reverse osmosis filter system is designed to fit under the sink, but you can also install it in a basement. You should consider whether a water filter has access to a cold water line and a drain, as well as whether a filter can be easily maintained on the location you have chosen. The pressure tank can be placed within 10 feet of the faucet, under the sink, or in the nearby cabinet. The RO unit is best located on the right side of the cabinet under the sink since all the tubing will be towards the back of the cabinet. The cold water supply valve should be as close to the RO unit as possible. Avoid connecting the drain line to a dishwasher drain, or any near a garbage disposal.

The gooseneck faucet installation

The faucet is usually located at the edge of sink. You will need a ¾” diameter hole on a flat surface. Drill the hole and file it after you are done drilling. Install the faucet according to the manual’s instructions. When installed, connect the faucet to the outlet of the post inline carbon filter by using a plastic pipe. Next, install the cold water supply valve.

The drain clamp assembly

The drain clamp is used for discharging into the sink drain pipe. The drain clamp consists of a drain clamp back plate, a drain clamp front plate, M6 nuts, M6x35 screws, an insert, a compression nut and a drain tubing. Above the drain trap, place the drain clamp on the drain pipe. Tighten it. Place the drain tubing.

The pressure tank ball valve installation

First, wrap the threads of the pressure tank with Teflon tape in order to prevent leaks. Locate the tank ball valve and attach it to the top of the pressure tank. Find the pipe from the water filter membrane and connect it to the tank ball valve and post carbon filter. It is important NOT to adjust the air valve on the pressure tank because the manufacturer preset it.

Mounting the unit

Cut the plastic pipe and locate it into the hexangular nut. Place the white pipe plug into the plastic pipe and then put the plastic pipe into the fitting. Tighten up the hexangular nut. Connect all the reaming piping. Now, you are ready to start your RO water filter system. Turn on cold water and check whether there are any leaks. Let the water drip out of the faucet for 10 minutes, then turn it off. Open the tank. It will take around 4 hours for the pressure tank to become filled. When the tank is full, flush the water. Fill the tank again. When the tank is filled, you can use the water.

In order to ensure the system is operating, change the spun fiber filter every 3 to 6 months, the granular carbon filter and the block carbon filter every 6 to 12 months and change the RO membrane every 24 to 36 months as well as the post carbon filter every 6 to 12 months.


Article written by Lillian Connors. If one thing is true about Lillian Connors, her mind is utterly curious. That’s why she can’t resist the urge to embark on a myriad of home improvement projects and spread the word about them. As the Co-Editor at SmoothDecorator, she cherishes the notion that sustainable housing and gardening will not only make us far less dependent on others regarding the dwellings we inhabit and what we eat, but also contribute to our planet being a better place to live on. You can check her out on Twitter and LinkedIn.

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  1. Thanks for this great one, Is there new or discount offer for this systems?

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