Best Bidets for a Tankless Toilet 2023

A tankless toilet

This article looks at the best bidets on the market for tankless toilets. The information and recommendations apply to truly tankless toilets (flushometers and the pressure-assisted kind) but also extend to wall-hung toilets that have inaccessible tanks.

The main thing these toilets have in common is that they don’t provide external access to the water supply connection. Whether you have a flushometer or a behind-the-wall tank, your bathroom probably lacks a shutoff valve next to the commode.

The best bidet for a tankless toilet is the LUXE Neo 320 because it comes with extra parts that can be used to source water from an alternative coldwater shutoff valve. For warm water, an extra 10′ hose can be purchased. Another option is the SmarterFresh sprayer that attaches to the faucet.

Hello Tushy makes a tankless toilet conversion kit that goes with the Tushy Classic. The conversion kit is great and will definitely get the job done, but it’ll end up costing more if you go that route.

The conversion kit is really just the extra parts that come with warm water-capable bidet attachments–namely, an extra-long hose, metal adapter, and fastener with a barb valve.

You can save a lot of money by getting a warm water bidet attachment from the beginning. The Tushy Spa is warm water capable but it costs 2-3x the price of most warm water bidets of equal quality.

What we’ll do here is go over the best overall pick, followed by the best handheld sprayer.

The Best Overall Bidet for a Tankless Toilet: The LUXE Neo 320

The LUXE Bidet Neo 320 - Self Cleaning Dual Nozzle - Hot and Cold Water Non-Electric Mechanical Bidet
The LUXE Bidet Neo 320

The overall best bidet for a tankless toilet is a bidet attachment called the LUXE Neo 320 (Amazon link). In case you’re new to the subject, bidet attachments are fixed to an existing toilet without replacing any parts.

What you’ll do is follow the directions for installing the warm water connection but do so on the cold water shutoff valve under the sink. The 10′ hose will run from the sink shutoff valve to the cold water inlet on the bidet and you’ll plug the warm water inlet with the hot water cap.

Pros of the Neo 320


To make any bidet work, you need access to a water source. It usually doesn’t really matter where the water comes from if you can the right hoses, connections, and adapters.

Tankless toilets like the flushometer kind don’t provide access to the water that feeds the toilet. The only time you see the water is when it enters the tank.

To get around this, you can hook your bidet to another water source in the bathroom. The Neo 320 comes with the parts that make this possible in a single package. So, there’s no need to go through the trouble of sourcing the extra parts separately.

Convenience and Ease of Use

The conversion kit is meant to attach your bidet to the shutoff valves beneath the sink. The only other option for installing bidets on tankless toilets (short of hiring a plumber to create a new water connection) is to connect the bidet directly to the faucet.

As we’ll see, the drawback of using the faucet method is that you may end up having to connect the bidet with each use. This means “installing” the bidet several times per day. Granted, it’s hardly an installation (you just screw it into the faucet) but it’s still more trouble than a lot of people want to deal with.

The sink shutoff valve method employed with the LUXE Neo 320 involves a one-time installation. Like any other traditional bidet installation method, you set it and forget it.

A Step up From Handheld Bidets

Bidet attachments, seats, and handheld sprayers operate without electricity (though “non-electric bidet” is typically used to refer to attachments).

Attachments and non-electric seats are mechanical and their moving parts work off pressure alone. That’s right, even the wand that extends and retracts is functioning via water pressure.

Attachments are more convenient because they can be added to your existing toilet without replacing anything. There’s no point in swapping out the entire seat if you’re not getting the awesome features offered by electric bidets.

Attachments are a step up from handheld sprayers because they’re automatic—no manual cleaning is needed. The bidet’s nozzle is already positioned in the bowl so it’s ready to spray with the turn of a dial.

Better Sanitation Than Handheld Bidets

Anything located in the toilet will be subjected to contamination with soiled water. Interestingly, bidet attachments, while in the toilet 24/7, are less likely to be contaminated with poo-containing water.

That’s for three reasons:

  • The nozzle is guarded when you’re doing your business. The nozzle is housed inside the attachment, so it’s not exposed when doing the number 1 or number 2.  
  • The nozzle sprays at an angle. The wand is sprayed at an angle to prevent being rained on by dirty water during a cleaning session.
  • The nozzle is self-cleaning. If your spray wand gets soiled with poo water, it has a self-cleaning function anyway.

Great Customer Service

One of the main things I like about LUXE is that they’re always there to answer questions. I’ve never entered a chat session without someone being there to respond to my questions with a thorough answer. If the chat representative doesn’t know the answer, they’ll pass it off to someone more knowledgeable.

Cons of the LUXE Neo 320

You Need to Have the Right Bathroom Layout

There are several problems you can run into when sourcing your water from the supply valves beneath the bathroom sink.

To make it work, it would be ideal if your bathroom has the following setup:

  • The toilet and sink are less than 10 feet apart. The hose needs to reach from the sink shutoff valve to the bidet. The supply hoses that come with bidets in the box are usually shorter than 10 feet, but longer hoses can be found. The Neo 320 comes with one that is 10 feet exactly. You’ll want a little play in the hose too, so having about 9 feet between the sink and toilet would be ideal.
  • The toilet and sink need to be on the same side of the wall. Or at least, not on opposite walls. A 90-degree angle can work too, especially if you’re planning to run the hose through the front of a vanity that holds the sink. But, if they’re on opposite walls, the hose would have to be draped across the floor which would pose a trip hazard.
  • Ideally, your sink is a pedestal sink (no vanity). If your sink is surrounded by cabinetry, you may have to drill a small hole as you would if you wanted to route a cable through the wall of an entertainment center. This is often out of the question for renters. So, even if your toilet and sink are close AND on the same wall, this installation method may not be right for you. If the vanity is moveable (not fixed to the wall), you can scooch it out an inch or so. Alternatively, you can feed the hose through the opening in the front (it would be an eyesore but it’s still an option).

For Warm Water You’ll Need Extra Parts

Most non-electric bidets only shoot cold water. (Although the water provided by “cold-water” bidets isn’t necessarily cold, let alone uncomfortable. “Unheated” would be a more accurate description. The actual temperature depends on the location and time of year).

Warm water-compatible non-electric bidets like the Neo 320 tap into the warm water that runs to the bathroom sink. From some that I’ve talked to, using warm water with non-electric bidets is more trouble than it’s worth. Not everyone feels this way but it’s a common sentiment.

The water runs cold in the beginning so most find that they’re done cleaning by the time the warm water kicks in. Others have gotten scalded this way because a home’s water heater puts out water upwards of 120 ̊F (48 ̊C) while electric bidets heat their water to between 32 ̊F (0 ̊C) and 104 ̊F (40 ̊C).

If you want to try it out, you can always source the extra parts from LUXE and return them if you don’t like it.

The Best Handheld Bidet for Tankless Toilets: The SmarterFresh Faucet Bidet

The SmarterFresh Faucet Bidet

Another great option is the SmarterFresh faucet handheld bidet (Amazon link). Some people prefer handheld bidets even to the most sophisticated of electric seats. They may lack all the bells and whistles of modern toilet seat bidets, but they have their perks.


  • Some prefer sprayers. Manual cleansing may be more work, but you can point the nozzle in all directions and move in as close as you want. You can rinse the backside for a minute and move around for some frontal cleansing. Sure, modern bidets offer good precision too, especially the electric seats with their digital control of nozzle positioning. LUXE attachments are quite accurate too and offer both posterior and feminine cleansing. But, when it comes to aiming, you get the most control with a handheld sprayer.
  • Less expensive. The LUXE Neo 320 is priced about average for a modern high-quality non-electric bidet of its kind. But handheld sprayers make up the cheapest category of bidets on the market. Unfortunately, this goes for both price and quality. I’ve seen sprayers go for as little as $5-8. You get what you pay for and the cheapest sprayers are notorious for leaking. This bidet is about average in price and quality for a handheld sprayer. It strikes a good balance between quality and affordability.


  • Bothersome and inconvenient (constant installations). As mentioned elsewhere in the article, by sourcing water from your faucet, you will need to attach the bidet with each use unless you don’t mind the supply hose always getting in the way. This may not be an issue for those who have two sinks because one could be dedicated to the bidet. Then again, bathrooms with more than one sink are usually shared so having to give up a sink is probably impractical for most. Also, if your toilet and sink are on opposite walls, it would mean draping the hose across the floor which would rule out having a dedicated bidet sink.
  • The hose may not reach your sink. The hose is probably fine for most small to medium bathrooms. At 7 feet, it’s about ¾ the size of the hose that comes with the Neo 320.
  • Being a sprayer, it’s more work to use. Older adults and other populations with limited mobility often switch to a bidet because manual wiping requires a degree of flexibility and coordination. Having to spray is like wiping in that respect—you have to reach down, around, and under to get the water where it needs to go. This would defeat the purpose for some.

Portable Options

The Pros of Portable Bidets (General)

  • Compatible with ALL toilets. Tank, no tank, or hidden tank, portable bidets can be used with any toilet. Attachments like those put out by LUXE are known to be a more universal fit than bidet seats because there’s no elongated vs. round distinction to contend with. But portable bidets have the attachments beat on this front because they can be used with the less common toilet designs. For example, attachments often run into trouble with one-piece toilets and commodes with French curves. So, if you move to a new location in the future you can be certain that the bidet will fit with future toilets.
  • Warm water capable. All you need is warm water to put in the reservoir and you’re good to go.
  • They double as a travel bidet. In fact, “travel” and “portable” are often used interchangeably in bidet marketing. As we’ll touch on, they do vary in how portable they are, but any travel bidet can easily be taken on trips and used in short-term accommodations like hotels and Airbnb.

The TOTO Handy Travel Bidet

The TOTO Travel Handy Washlet

TOTO is probably the most recognizable name in the bidet industry. One of their more popular models is the TOTO Handy Washlet (Amazon link).

It provides a thorough clean comparable to that of high-tech bidet seats. For example, the pressure and volume coming out of the nozzle are the same. The water reservoir in this model is about the same size as the warm water tank in electric seats so the spray time is about equal.  

So, all in all, you’ll get about the same clean that you would with a high-quality bidet seat. The main difference is that it’s not tethered to the toilet in any way. Hence, you’ll avoid all the pitfalls that you’d encounter installing a toilet seat bidet.

Of course, another difference is that it lacks the other technology present in high-tech seats (e.g., warm air dryer, heated seat) but that can be said of the LUXE models and other attachments.


  • Zero installation. Hence, zero installation issues. This is the main feature that makes it great for tankless toilets.
  • Warm water capable. Just fill the reservoir with warm water.
  • It doubles as a travel bidet. It can be used anywhere including public restrooms (unlike the MyPortaWash).
  • Easy to handle and aim.
  • You can use filtered water. Just add filtered water to the reservoir. Using clean water is important for avoiding infections. Women are at a higher risk of UTIs and other urogenital infections. There are ways of adding a filter to the LUXE and SmarterFresh bidets, but you’ll have to get extra parts and set it up yourself. With this one, the filter is worked into the design.


  • Limited spray time (kind of). If it runs out, you’ll have to refill it.

The MyPortaWash Bidet

The MyPortaWash Portable Rechargeable Bidet

Another great bidet for any toilet is the MyPortaWash portable handheld bidet (Amazon link). It’s battery-powered and rechargeable.

As mentioned earlier, the main thing you need to make a bidet work is access to a water source. If the water is close enough, it doesn’t usually matter what the source is.

The MyPortaWash is a great example of this. This travel-friendly handheld bidet uses an electric motor to pull water from a container sending it through the nozzle. It comes with a collapsible bucket so it holds a lot of water yet is easy to fit in luggage.


  • No installation/is compatible with all toilets.
  • Bigger water stream. This is true of handheld bidets in general. This may or may not be a good thing depending on your preferences. It uses more resources, but a larger water stream means a faster clean.
  • Longer water stream. Again, if you run out of water mid-wash when using the TOTO travel bidet, you can always fill it back up. Having a large (yet collapsible) water container, it’s highly unlikely you’ll run out when using the MyPortaWash.
  • Contains a water filter. The MyPortaWash comes with a filter. Most tap water is clean (or it’s supposed to be) but it depends on where you live. With this bidet, you don’t have to worry about sourcing the filtered water to put in the reservoir. No matter where you find yourself using the bidet, you can be sure that you’re using clean water.
  • You can use it as a travel bidet. It is limited in this respect (see the cons).
  • Rechargeable. You don’t have to swap out batteries.


  • Compared to the TOTO Handy Washlet, the MyPortaWash is limited as a portable bidet. This has nothing to do with tankless toilets, but I will mention it. The MyPortaWash is great for traveling, but it contains more than one component and isn’t compact enough to use in public restrooms. It’s suited for traveling in that it can easily be packed and used in hotels and Airbnb. It’s portable in the sense that it’s not connected to a bathroom fixture (or anything else).

What About Electric Bidets?

As for installing an electric bidet on a tankless toilet, it can be done via installation method one as outlined in the article on how to install a bidet on a tankless toilet. For the reasons outlined in this article, it only works if the bathroom design allows for it.

Also, a lot of tankless toilets are skirted, or have concealed trapways. So, you may want to check out the article on how to install a bidet on a skirted toilet. The main problem with skirted toilets won’t apply because you won’t be using the fill valve. But those with skirted toilets sometimes run into problems with mounting hardware.

In this article, I recommended a warm water bidet attachment because they come with the needed connections. For an electric bidet, you’ll have to source all the right parts.

If you can’t find the parts you need, the best option may be to hire a plumber to install a shutoff valve next to the toilet.

Recent Posts