7 Best Tankless Toilets of 2026

If you need a toilet solution that requires zero plumbing, the Thetford Porta Potti is the gold standard. It is technically “tankless” in that it doesn’t connect to a water line or sewer; it is entirely self-contained.

This unit features a 4-gallon fresh water tank for flushing and a sealed 3.2-gallon waste tank. It uses a manual bellows pump to flush, meaning you don’t need electricity or batteries. The integrated pouring spout and pressure relief button make emptying the waste tank surprisingly clean and splash-free.

While it is made of plastic, the build quality is high. It is the best portable camping toilet for vans, campsites, or emergency preparedness.

Most RV toilets feel flimsy, but the Dometic 320 Series changes the game. It is constructed from 100% vitreous china (ceramic), giving it the sturdy feel of a residential toilet rather than a plastic camper unit.

The elongated bowl and full-size wooden seat provide home-like comfort on the road. It operates via a gravity flush system triggered by an ergonomic foot pedal. Press slightly to add water, or press fully to flush.

The rim design ensures water rinses the entire bowl with every flush, keeping things cleaner. At 37 pounds, it is heavier than plastic alternatives, but the durability and comfort trade-off is worth it for full-time RVers.

The Woodbridge Smart Toilet is a true tankless unit that combines sleek design with high-end technology. It features an integrated booster pump, meaning it doesn’t rely solely on your home’s water pressure to flush, ensuring a clean bowl every time.

This luxury model includes a built-in bidet function with adjustable water pressure, temperature, and nozzle position. You also get a heated seat, warm air dryer, and a deodorizer that pulls air through a carbon filter.

The automatic flush feature is a standout; it detects when you stand up and flushes for you. While the price point is higher than a standard commode, you are effectively getting a modern toilet and a premium bidet in one streamlined package.

The Saniflo Sanicompact is a problem-solver. It is designed for spaces where you can’t install traditional plumbing, such as basements, attics, or garages. This tankless toilet has a built-in macerator pump that grinds waste and pumps it vertically up to 9 feet and horizontally up to 120 feet to reach your main sewer line.

It is incredibly water-efficient, using just 1 gallon per flush. The design is compact and tankless, saving significant floor space. You can even connect a sink drain to it, allowing the unit to pump out greywater from a vanity as well.

Because it relies on a macerator, you must be careful about what you flush, only toilet paper and human waste. Items like dental floss or wipes can jam the motor.

Toto is the industry leader in bathroom technology, and this Washlet combo proves why. This unit pairs the G400 integrated toilet with a high-tech Washlet bidet seat. The result is a compact, low-profile toilet that fits perfectly in smaller en-suites.

It features Toto’s 3D Tornado Flush, a powerful cyclonic action that scrubs the bowl using only 1.28 GPF. The CeFiONtect ceramic glaze is ultra-smooth, preventing waste from sticking.

You get all the premium bells and whistles: auto-open/close lid, heated seat, premist (which wets the bowl before use), and a remote control. While the price is steep, the build quality and reliability of Toto components are unmatched.

For marine applications, reliability is everything. The Jabsco Twist ‘n’ Lock is the go-to manual toilet for boat owners worldwide. It features a straightforward manual pump that flushes waste either overboard or into a holding tank.

The “Twist ‘n’ Lock” safety handle is a crucial feature; by turning the handle 90 degrees, you lock the piston in place, preventing dangerous backflow or flooding while underway.

The unit is built with corrosion-resistant materials, making it suitable for both fresh and saltwater use. It is available in a compact size for tight heads or a regular bowl size for more comfort. It’s simple, mechanical, and easy to service, exactly what you want on a boat.

If you want the ultra-minimalist look of a floating toilet, the Swiss Madison Ivy is a fantastic choice. By hiding the tank inside the wall, you gain floor space and make cleaning the bathroom floor incredibly easy.

This unit features a glossy white, elongated bowl that hangs securely from a steel carrier system (sold separately). It is a dual-flush system, offering 0.8 GPF for liquids and 1.28 GPF for solids, making it highly eco-friendly.

Because it is wall-mounted, you have the flexibility to install it at any height you prefer, from standard to ADA comfort height. The sleek, one-piece porcelain design has no crevices for dirt to collect, keeping your bathroom looking pristine.