Homeowners who seek clean, safe drinking water from their taps should consider installing water filters under their sinks. These systems can improve water by removing contaminants, sediment, and unpleasant tastes, and installation can be a breeze. Read how to install an advanced water filtration system in our step-by-step guide below, which also includes a list of tools you’ll need and maintenance tips.
Benefits of Under-Sink Water Filters
Under-sink water filters offer several advantages over other water filtration methods, including the following:
- Convenience: These filters provide clean water on demand without the need for frequent refilling.
- Cost-effective: The initial investment can seem expensive, but under-sink filters last longer and require less frequent cartridge replacements than pitcher filters.
- Improved water quality: These systems can remove a wide range of contaminants, such as chlorine, lead, pesticides, and pharmaceuticals.
- Space-saving design: Under-sink filters are hidden from view, which preserves your kitchen’s aesthetics.
Choosing the Right Under-Sink Water Filter
You must select the right under-sink water filter to get the results you seek. Consider the variables below when making your choice:
- Contaminant removal: Make sure the filter you choose removes the specific contaminants that are in your water supply. Test your water to know for certain what’s in your system.
- Filter lifespan: Consider how frequently you’ll need to replace filters, and what the associated costs will be. Filters that last longer may end up saving you money.
- Filtration technology: Choose a system that uses advanced filtration methods, such as activated carbon or reverse osmosis. These technologies remove a wide range of contaminants.
- Flow rate: Choose a system that provides an adequate flow of filtered water. A low flow rate can be frustrating, especially during peak usage times.
- Installation requirements: Some systems may require professional installation, while others are suitable for do-it-yourself installation.
Tools and Materials Needed
Gather the necessary tools and materials below before you begin the installation process:
- Adapters and connectors
- Adjustable wrench
- Bucket or tray
- Screwdriver
- Plumber’s tape
- Under-sink water filter kit, which includes filter housing, cartridges, and tubing
Step-by-Step Installation Guide
Follow the steps below to properly install your under-sink water filter:
- Shut off the cold water supply: Locate the shutoff valve under the sink and turn it clockwise to stop the water flow.
- Relieve pressure: Open the cold water faucet to release any remaining pressure inside the line.
- Disconnect the cold water line: Place a bucket or tray under the connection to catch any water. Use an adjustable wrench to loosen and remove the supply line from the shutoff valve.
- Install the filter adapter: Attach the adapter that comes with your filter kit to the shutoff valve. Use plumber’s tape on the threads for a watertight seal.
- Connect the filter inlet: Attach the tubing from the filter’s inlet port to the adapter on the shutoff valve. Most modern systems include push-to-connect fittings for easy installation.
- Mount the filter housing: Secure the filter housing to the cabinet wall. Make sure it’s level, and that you can easily access it for future cartridge replacements.
- Connect the filter outlet: Attach the tubing from the filter’s outlet port to the cold water line that leads to the faucet.
- Install the filtered water faucet: If your system includes a separate faucet for filtered water, install it by following the manufacturer’s instructions.
- Turn on the water and check for leaks: Slowly open the shutoff valve and inspect all connections for leaks. Tighten any loose fittings.
- Flush the system: Run cold water through the filter for several minutes to activate the carbon and flush out any manufacturing residue.
Maintenance and Filter Replacement
You must regularly maintain your water filter and replace cartridges to keep your system functioning properly. Consider the tips below.
- Clean the filter housing periodically: Clean the filter housing regularly to prevent bacterial growth and maintain water quality.
- Inspect connections regularly: Check for leaks and tighten any loose connections to prevent water damage.
- Replace filter cartridges: Change filters every 6–12 months, or according to the manufacturer’s instructions. Some models feature built-in indicators that tell you when it’s time to replace cartridges.
Troubleshooting Common Issues
Issues may arise even if you install your system correctly. Read about some potential problems and how to address each below.
- Leaks: Make sure you have properly sealed all the connections, and that they’re tight. Inspect and replace any damaged O-rings or fittings to stop leaks.
- Low water pressure: Kinked tubing or clogged filter cartridges can cause low water pressure. Inspect the tubing for any bends, and replace the cartridge if necessary.
- Strange taste or odor: If the water develops an unusual taste or smell, flush the system thoroughly, or replace the filter cartridge.
Additional Tips for Installing and Maintaining Your Filter
Keep the following tips in mind when you’re installing and maintaining your system. These can help to extend the life of your filter:
- Keep replacement cartridges on hand: If you have spare cartridges on hand, you can make replacements immediately.
- Read the manufacturer’s instructions carefully: Each system might include specific requirements and recommendations.
- Schedule regular maintenance checks: Set reminders to inspect your filter system so that you can catch any issues early.
