Clean drinking water is a necessity for every household. Installing a reverse osmosis (RO) system is one of the most effective ways to ensure that you and your family drink safe, toxin-free water. 

In this article, we will take the TOKIT AkuaPure U2 RO system as a case study and provide a detailed guide on how to install an under-sink water filter.

Let’s continue reading.

Why We Chose the TOKIT AkuaPure System

If you're looking for a system that provides clean, mineralized water, the TOKIT AkuaPure U2 under-sink water filter is a great choice. Many people who have used the TOKIT under sink water filter have highlighted the health benefits of clean, mineralized water, especially for those with autoimmune conditions. Clean water not only improves taste but also helps eliminate toxins and ensures your body gets the essential minerals it needs to function properly.

You'll love the TOKIT under-sink water filter because it combines filtration and mineralization in one compact, powerful unit. Unlike many other systems that require bulky water tanks, it saves space and can be easily installed under your sink, making it a practical solution for smaller spaces.

Benefits of Reverse Osmosis Systems

Reverse osmosis systems work by filtering out contaminants through a semipermeable membrane while retaining essential minerals. Some of the key advantages include:

• Cleaner water: Removes harmful substances like chlorine, lead, and other potential toxins.

• Improved taste: Eliminates unpleasant odors and tastes from your water.

• Healthier hydration: Maintains important minerals like calcium and magnesium, improving overall health.

It’s not about turning water into a cure-all, but it does make a noticeable difference in quality and safety. To learn more about the benefits of reverse osmosis systems, refer to the 10 benefits of reverse osmosis systems.

Tools Needed to Install an Under Sink Water Filter

The great thing about the TOKIT AkuaPure under sink water filter is it comes with nearly everything required for setup. Here’s what else you’ll need:

• Drill with bits (in case you need to drill a hole in the faucet).

• Adjustable wrench.

• Thread seal tape for plumbing connections.

Check the space under your sink before starting to make sure everything will fit.

Getting Started: Unboxing and Preparing

Unboxing the TOKIT AkuaPure under sink water filter was straightforward. Inside the box, you’ll find the following:

• The filtration unit itself.

• A silver faucet labeled “Filtered” and “Reverse Osmosis.”

• Hoses, washers, and other fittings.

• Basic tools for installation.

One of the concerns many people have is whether it will fit under the sink. Thankfully, the system is compact, much smaller than its packaging suggested. If your sink area is cluttered, now’s the time to clear it out for easier installation.

Installing the Faucet

If you have an unused hole in your sink for a soap dispenser, this step is easy. If not, you’ll need to drill a hole—don’t worry, it’s straightforward with the right drill bit.

Here’s how we installed the faucet:

1. Remove any existing hardware from the hole.

2. Place the decorative washer on top of the countertop.

3. Secure the faucet from below using rubber and metal washers, spacers, and nuts.

4. Tighten everything for a snug, leak-free fit.

The faucet stays steady if tightened properly. Don’t overtighten as this could damage your sink.

Hooking Up the Water Supply

Turning off your main water supply is the first step. Afterward:

1. Locate the cold water line and attach the splitter that comes with the kit.

2. Use the provided inlet valve to connect the system to your plumbing.

3. Add thread seal tape to the connections to prevent leaks.

This step is simple but requires careful tightening. A loose connection will result in annoying leaks.

Connecting the Drain Line

The under sink water filter requires a connection to your sink’s drainpipe. Here’s how we managed it:

1. Drill a small hole into the drainpipe where the line will connect.

2. Attach the included foam pad and clamp tightly around the pipe to secure the drain line.

3. Double-check that everything is sealed tightly to avoid leaks.

This is one of the messier steps, but it’s essential for proper water flow.

Attaching the Hoses

The TOKIT under sink water filter unit has four hoses, each with a specific role:

• Water inlet hose: Brings water into the system.

• Drain hose: Carries waste water out.

• Faucet hose: Connects to your new faucet.

• Filtered water hose: Returns clean water to your sink.

Follow the provided instructions to attach them to their correct ports on the system. A quick push-and-lock mechanism ensures secure connections.

Powering the System

One minor issue you may run into during installation is that the outlet under the sink is connected to the light switch. To fix this, you can drill a small hole in the cabinet and run an extension cord to a nearby outlet that is normally open. Once plugged in, the system is powered on and ready to go.

Testing for Leaks

After connecting all the parts, it’s time to turn the water back on. Carefully check every connection for any signs of dripping. If you notice any leaks:

1. Turn off the water supply immediately.

2. Drain the system by opening the faucet.

3. Reapply thread seal tape and retighten connections.

By following these steps carefully, you can quickly eliminate these problems.

Flushing the System

Before drinking the water, the system needs to be flushed to remove any food-grade lubricants inside the unit. Here’s the recommended process:

• Run the water for 20 minutes every two hours.

• Repeat this process 12 times.

This ensures the system is clean and fully operational before regular use.

Final Placement

Once everything is set up and tested, the filter unit can be secured under the sink. Its slim design allowed it to fit neatly between the wall and existing pipes. Make sure to leave enough space for easy filter changes down the line.

Common Challenges and How to Solve Them

While the installation was relatively easy, a few minor challenges came up:

• Tight spaces under the sink: Clear the area beforehand for easier maneuvering.

• Minor leaks at connections: Always use ample thread seal tape.

• Power outlet tied to a switch: Use an extension cord to access an always-on outlet.

These issues are manageable with a little patience.

Long-Term Maintenance

To keep the TOKIT AkuaPure U2 under sink water filter running smoothly, follow these tips:

• Replace the filter every two years as recommended.

• Check for leaks periodically to catch small issues early.

• Flush the system occasionally to maintain water quality.

Final Thoughts

Installing the TOKIT AkuaPure under sink water filter was a rewarding DIY project. It’s a compact, efficient solution for clean water that fits into tight spaces. Whether you’re looking for better-tasting water or added minerals for health, this system delivers.

With the right tools and a little confidence, anyone can install this system. It’s a small effort for a huge improvement to your drinking water. Ready for cleaner water in your home? Go for it—you won’t regret it.

Related reading: Best under-sink water filter system For 2024