How to Install a Bidet on a Tankless Toilet

How to Install a Bidet on a Tankless Toilet: Step-by-Step Guide

Ever find yourself asking, “Hey, can you install a bidet on a tankless toilet?” You’re not alone.

It’s a question that’s been bugging tons of folks out there.

The thought of installing a bidet on a tankless toilet can be daunting – what if it doesn’t fit right?

What if it ends up causing more hassle than it’s worth?

I feel you.

It’s not a walk in the park, especially when you’re not sure what you’re doing.

But don’t sweat it!

This guide is your new sidekick, ready to steer you through the process.

We’ll break down each step to make things easy-peasy, all while keeping it real with some solid advice.

Tankless Toilets Types

True Tankless (Flushometer)Powerful flush, efficient, commercial use
Pressure-AssistedCompressed air, water-efficient
Concealed CisternSleek, modern, space-saving

True Tankless Toilets (Flushometer)

Flushometers are the real deal when it comes to tankless toilets.

They’re connected directly to the water supply, providing a powerful flush without the need for a tank.

You’ll often find them in commercial settings, where water pressure is high.

They’re efficient, sleek, and perfect for places that need quick bathroom turnover.

But hey, they can be a bit noisy, so maybe not the best choice for a peaceful home bathroom. 🚽

Pressure-Assisted Tankless Toilets

Pressure-assisted toilets are like the superheroes of the bathroom world.

They use compressed air to boost the flushing power, making them super effective in clearing waste.

Plus, they’re water-efficient, so you’re saving the planet one flush at a time.

But watch out!

They can be a bit on the pricey side, and the flush might startle you with its force. 💥

Concealed Cistern (Behind the Wall Tanks)

Ever wanted a toilet that’s like a magic trick?

Concealed cistern toilets are your answer.

The tank is hidden behind the wall, giving a sleek and modern appearance.

It’s all about aesthetics and space-saving with these beauties.

They’re perfect for smaller bathrooms or if you’re going for that minimalist vibe.

Just keep in mind, maintenance might be a bit tricky since everything’s hidden away. 🧙‍♂️

So, you’re thinking about installing a bidet on a tankless toilet, huh?

Well, knowing the type of tankless toilet you have is the first step in making sure everything fits together like a puzzle.

Whether it’s the powerful flushometer, the superhero pressure-assisted, or the magical concealed cistern, each has its quirks and features that’ll play a role in your bidet installation.

Compatibility of Bidets with Tankless Toilets

When it comes to tankless toilets, the idea of installing a bidet might seem like a plumbing puzzle.

But fear not, dear reader!

Let’s dive into the compatibility of bidets with different types of tankless toilets.

Challenges in Installation

  • Finding the Right Fit: Tankless toilets, especially those resembling public restrooms with metal pipes going directly into the wall, can be tricky. Most bidets on the market don’t explicitly mention compatibility with tankless toilets. Some claim to fit “”all”” toilet seats but only refer to one or two-piece toilets with tanks.
  • Price Constraints: Looking for a bidet that fits a tankless toilet and costs less than $100? It’s like finding a needle in a haystack. But don’t lose hope; there are solutions.

Solutions and Alternatives

  • Travel Bidets: Who says you need a fixed bidet? Travel bidets are a handy and affordable option.

They’re like a water bottle with a bidet nozzle at the end, costing around $10, and no headaches involved.

  • Consult the Community: Platforms like Reddit are filled with folks facing the same bidet compatibility conundrum. Engaging with the community might lead you to the perfect bidet for your tankless toilet.
  • Consider the Bathroom Layout: If your bathroom sink is close to the toilet, you might have more options.

But be mindful of the aesthetics; water supply lines running across the floor might not be the cutest sight.

So, ready to spruce up your tankless toilet with a bidet?

Whether it’s a flushometer, pressure-assisted, or concealed cistern, there’s a bidet out there for you.

Just keep these challenges and solutions in mind, and you’ll be enjoying the hygiene benefits of a bidet in no time.

How to Install Bidet on Tankless toilet:-

Method 1: Using an Alternative Shutoff Valve

Step 1: Route the Supply Hose to the Coldwater Shutoff Valve Beneath the Bathroom Sink

  • What: This step involves planning the path for the bidet hose to reach the cold water valve beneath the sink.
  • Why: By connecting to the cold water valve, you can utilize the existing plumbing to supply water to the bidet.
  • How: Carefully measure the distance and choose a hose of appropriate length.

Avoid any sharp bends or kinks that might restrict water flow.

Step 2: Turn the Cold Water Valve Off

  • What: Shutting off the cold water valve.
  • Why: To prevent water from flowing while you’re working, ensuring a dry and safe work environment.
  • How: Turn the valve handle clockwise until it’s in the off position.

Step 3: Disconnect the Cold Water Sink Supply Hose

  • What: Disconnecting the hose that supplies cold water to the sink.
  • Why: To attach a T-connector that will allow water to flow to both the sink and the bidet.
  • How: Using an adjustable wrench, unscrew the hose from the valve.

Step 4: Attach a 3/8″ T-Connector to the Valve

  • What: Attaching a T-connector to the cold water valve.
  • Why: This connector splits the water supply, enabling you to connect both the sink and the bidet to the same source.
  • How: Screw the T-connector onto the valve, ensuring a tight fit.

You may use Teflon tape to prevent leaks.

Step 5: Connect the Cold Water Sink Supply Hose to the T-Adapter

  • What: Reconnecting the sink’s supply hose to the new T-adapter.
  • Why: To restore the sink’s water supply while also providing a connection for the bidet.
  • How: Screw the hose onto the T-adapter, using a wrench to secure it.

Step 6: Attach the Bidet Hose

  • What: Connecting the bidet hose to the T-connector.
  • Why: To supply water to the bidet from the cold water valve.
  • How: Attach the bidet hose to the remaining outlet on the T-connector.

Use Teflon tape to ensure a watertight connection.

These steps provide a clear and concise guide to installing a bidet on a tankless toilet using an alternative shutoff valve.

By following this method, you can successfully connect the bidet to the existing plumbing system, ensuring a functional and aesthetically pleasing setup. Certainly!

Let’s delve into the details of each step for a clear understanding

Method 2: Hooking the Bidet to the Faucet

This method involves connecting the bidet directly to the faucet, bypassing the need for a T-connector or other additional plumbing components.

It’s a straightforward approach that can be suitable for specific bidet types, such as handheld bidet sprayers.

Step 1: Choose a Compatible Faucet Adapter

  • What: Selecting an adapter that fits your faucet’s size and threading.
  • Why: To ensure a secure connection between the faucet and the bidet hose.
  • How: Measure the faucet’s threading and choose an adapter that matches those specifications.

Step 2: Remove the Existing Faucet Aerator (if present)

  • What: Unscrewing and removing the aerator from the faucet.
  • Why: To make room for the bidet hose adapter.
  • How: Use pliers or a wrench to unscrew the aerator, turning it counterclockwise.

Step 3: Attach the Faucet Adapter

  • What: Connecting the chosen adapter to the faucet.
  • Why: To provide a connection point for the bidet hose.
  • How: Screw the adapter onto the faucet where the aerator was removed. Tighten it securely.

Step 4: Connect the Bidet Hose to the Adapter

  • What: Attaching the bidet hose to the faucet adapter.
  • Why: To supply water to the bidet from the faucet.
  • How: Screw the bidet hose onto the adapter, ensuring a tight fit.

Use Teflon tape if necessary to prevent leaks.

Step 5: Test the Connection

  • What: Running water through the bidet to check for leaks.
  • Why: To ensure that the connection is secure and that the bidet is functioning properly.
  • How: Turn on the faucet and activate the bidet, checking for any leaks at the connection points.

Step 6: Adjust Water Pressure as Needed

  • What: Adjusting the faucet to achieve the desired water pressure for the bidet.
  • Why: To provide a comfortable and effective bidet experience.
  • How: Use the faucet’s handles to adjust the water pressure to your preference.

This method offers a simple and direct way to connect a bidet to a tankless toilet by utilizing the existing faucet.

It’s particularly suitable for handheld or portable bidets and can be an excellent option for those looking for a less complex installation process.

Final Say So!

Well, folks, there you have it!

You asked, “Can I install a bidet on a tankless toilet?” and now you’ve got your answer.

With a dash of determination, a sprinkle of savvy, and this guide as your trusty blueprint, installing a bidet on any tankless toilet is no longer a plumbing puzzle.

It’s a DIY victory!

Whether you choose the alternative shutoff valve method or hook it directly to the faucet, the path to a fresher, cleaner you is now as smooth as a well-polished porcelain throne.

So go ahead, take the plunge, and let the power of the bidet elevate your bathroom to a whole new level of luxury and hygiene.

Happy flushing, friends! 🚽💧🎉


Why are bidet toilets tankless?

Bidet toilets are often tankless to save space and provide a sleek, modern appearance. Tankless designs connect directly to the water supply, allowing for continuous water flow without the need for a storage tank.

How does a tankless bidet toilet work?

A tankless bidet toilet works by utilizing a high-pressure valve that draws water directly from the main supply. It heats the water instantly if needed and sprays it through a nozzle for cleansing. The absence of a tank allows for immediate water delivery and temperature control.

Can I install bidet to toilet with no tank?

Yes, you can install a bidet to a toilet with no tank. Specific methods and adapters may be required, depending on the type of bidet and toilet design. It’s advisable to consult the bidet’s installation guide or a plumbing professional to ensure compatibility.

Is it a good idea to have a tankless toilet?

Having a tankless toilet can be a good idea, especially if you value water efficiency, modern design, and space-saving. Tankless toilets often offer powerful flushing and can be more hygienic due to fewer crevices where bacteria can grow. However, they may require higher water pressure and can be more expensive to install.

How do you flush a tankless toilet without water?

Flushing a tankless toilet without water is generally not possible, as they rely on direct water supply for operation. In case of a water outage, you may need to manually pour water into the bowl to flush or wait until the water supply is restored.

How much pressure does a tankless toilet need?

A tankless toilet typically requires a water pressure of around 40 to 80 psi (pounds per square inch). The exact pressure needed may vary depending on the specific model and manufacturer’s recommendations. Insufficient water pressure may lead to weak flushing and reduced performance.

Steven Bosque

Dale Cogburn

Hi, I’m Dale Cogburn! I’m passionate about helping people get the most out of their bidets. I’m an expert on all things related to bidets, from installation and maintenance to product reviews. I’ve been using and researching bidets for over 10 years.

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