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Reverse Osmosis System Installation

Have you been thinking about Reverse Osmosis System Installation in your home? You’re not alone. Many homeowners are turning to reverse osmosis systems for their water purification needs. In this comprehensive guide, we will walk you through the entire process of reverse osmosis system installation, from understanding the basics to maintaining your new system.

The Reverse Osmosis Process

Water is forced through a semipermeable membrane under pressure, leaving contaminants behind. The purified water then flows through to the other side, while the contaminants are flushed away.

Benefits of Installing a Reverse Osmosis System

  1. Improved taste and odor of water
  2. Removal of contaminants like lead, chlorine, and pesticides
  3. Cost-effective and environmentally friendly solution
  4. Low maintenance requirements

Types of Reverse Osmosis Systems

Under-Sink Reverse Osmosis Systems

These systems are installed under the kitchen sink and provide purified water at a single faucet.

Whole-House Reverse Osmosis Systems

Countertop Reverse Osmosis Systems

Components of a Reverse Osmosis System

A typical reverse osmosis system includes:

  1. Pre-filters
  2. RO membrane
  3. Post-filters
  4. Storage tank
  5. Faucet
  6. Drain line
  7. Tubing and fittings
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plumbing repipes

Reverse Osmosis System Installation: Preparing


  1. Adjustable wrench
  2. Drill with appropriate bits
  3. Teflon tape
  4. Bucket

Step 1: Choose the Location

Select a location under the sink with enough space for the system and storage tank. Ensure there is easy access for maintenance.

  1. Determine the best location for the faucet on the countertop or sink. If there’s an existing hole for a soap dispenser or an extra hole for a sprayer, you can use that.
  2. If you need to drill a hole, place masking tape on the area and mark the center of the hole. Use a drill with an appropriate bit to create the hole. Remember to start with a smaller bit and gradually increase the size.
  3. Apply Teflon tape to the threads of the faucet stem and insert the faucet into the hole. Secure the faucet from underneath using the provided hardware.

Step 2: Connect the System to the Water Supply

  1. Turn off the cold water supply valve under the sink.
  2. Install the feed water adapter between the cold water supply valve and the flexible hose connected to the sink faucet.
  3. Connect the tubing from the reverse osmosis system to the feed water adapter using a compression fitting.

Step 3: Install the Drain Line

  1. Locate the sink’s drainpipe and identify a suitable location for the drain saddle.
  2. Drill a hole in the drainpipe for the drain line, taking care to avoid any existing connections.
  3. Attach the drain saddle to the drainpipe, aligning the hole with the hole you drilled. Secure it with the provided hardware.
  4. Connect the tubing from the reverse osmosis system to the drain saddle using a compression fitting.

Step 4: Connect the Storage Tank

  1. Wrap Teflon tape around the threads on the storage tank’s valve.
  2. Connect the tubing from the reverse osmosis system to the storage tank’s valve using a compression fitting.
  3. Place the storage tank in the chosen location under the sink.
  4. Remove the protective caps or packaging from the filters and membrane.
  5. Install the pre-filters into their designated housings. Install the RO membrane into its housing. Make sure it’s seated properly and tighten the housing cap.

Step 5: Flush the System and Check for Leaks

  1. Turn on the cold water supply valve and let the storage tank fill with water.
  2. Once the tank is full, open the RO faucet to flush the system. The first few gallons of water may contain some carbon fines from the filters, so don’t use it for drinking.
  3. Close the RO faucet and let the tank fill again. Inspect all connections for leaks and tighten any fittings as necessary.
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Maintaining Your Reverse Osmosis System

Regular maintenance is essential to keep your reverse osmosis system functioning optimally. Replace the pre-filters and post-filters every 6-12 months and the RO membrane every 2-3 years.

Installing a reverse osmosis system is an effective way to ensure you have access to clean, purified water in your home. By following the steps outlined in this guide, you can successfully install an under-sink reverse osmosis system and enjoy the many benefits it offers.

FAQs Reverse Osmosis System

  1. How much does it cost to install a reverse osmosis system? The cost varies depending on the type of system and any additional labor required. Expect to spend between $200 and $800 for the system itself and an additional $100 to $300 for professional installation.
  2. Is reverse osmosis water safe to drink? Yes, reverse osmosis water is safe to drink and typically has a better taste and odor than tap water. Reverse osmosis systems effectively remove contaminants, making it a safe and healthy option for drinking water.
  3. Can I install a reverse osmosis system myself? Yes, many homeowners choose to install their reverse osmosis systems.
  4. Does a reverse osmosis system require a lot of maintenance? Reverse osmosis systems require minimal maintenance. Regularly replacing the filters and membrane is essential to keep the system running efficiently.
  5. Will a reverse osmosis system remove all minerals from my water? However, trace amounts of beneficial minerals may remain.


If you need professional help with your reverse osmosis system installation or have any questions, contact Jilly Plumbing Boerne. Don’t wait any longer to enjoy clean, purified water in your home – get in touch with Jilly Plumbing Boerne today!


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