Pressure-Assist Toilets

Pressure-assist toilets work differently from a standard gravity toilet: a sealed vessel inside the tank traps air as the tank fills, and when you flush, that compressed air drives water into the bowl with real force. The result is a strong, fast flush that clears the bowl in one go and leaves less residue on the sides, which is why this style is often chosen for high-traffic bathrooms, rental units and homes where clogs have been a recurring headache.

On this page you will find two-piece pressure-assist toilets from American Standard in the Cadet and Yorkville series, such as the Cadet® Two-Piece Pressure Assist 1.1 gpf/4.2 Lpf Elongated EverClean® Toilet and the Yorkville® Two-Piece Pressure Assist 1.6 gpf/6.0 Lpf Back Outlet Elongated EverClean® Toilet. Before you choose, think about how the toilet will connect to your drain, how high you want the seat to sit, and whether a sharper flush sound is acceptable in that part of the house. Pressure-assist units are louder than gravity models, so they tend to suit main floor powder rooms and basements more than a bedroom ensuite. Check each product page for the specifics that matter to your rough-in and your plumber.

What to check before you buy

• Confirm your drain location. Floor outlet and back outlet toilets connect in different places, so check where your existing drain sits before choosing. A back outlet model is typically used where the waste line comes out of the wall rather than the floor.
• Measure your rough-in. Measure from the finished wall to the centre of the drain or closet bolts, and compare that number with the specification on the product page. Also confirm you have enough clearance on each side and in front for comfortable use.
• Decide on bowl height. Chair height bowls sit higher than standard bowls, which is easier for taller people and anyone with knee or hip concerns. Standard height suits children and shorter users better.
• Consider noise and water supply. Pressure-assist toilets flush louder and faster than gravity toilets, and they rely on adequate household water pressure to charge the tank. If your supply pressure is low, ask your plumber whether this type is a good fit.
• Check flush rate and seat details. Flush ratings differ from model to model, so read the product page to confirm the water use per flush and whether a seat is included. This helps you compare models fairly and budget for any accessories.

Related pages and guides

• Toilets
• American Standard Toilets
• TOTO Toilets
• Best Dual-Flush Toilets in Canada: A Practical Buying Guide
• MaP Scores Explained: The One Toilet Spec That Matters
• Caroma Dual-Flush Toilets: A Canadian Buyer's Guide

Frequently asked questions

Are pressure-assist toilets noisy?

Yes, they are noticeably louder than gravity toilets because compressed air forces the water out quickly. The flush is short, but the sound is sharper, so many people place them in powder rooms, basements or rental units rather than next to a bedroom.

Do pressure-assist toilets clog less often?

The forceful flush is better at clearing waste in a single pass and keeps the bowl cleaner, which is why they are popular in busy households. They still depend on a properly sized and vented drain line, so they are not a fix for a damaged or undersized pipe.

Can a pressure-assist toilet be installed in any bathroom?

In most cases yes, as long as the rough-in, drain location and water supply pressure are suitable. Confirm the rough-in measurement and whether you need a floor or back outlet, and have a plumber check your supply pressure if you are unsure.