A siphonic jet toilet has a siphon system in its drain that pulls waste through the drain. This system comes in two forms: reverse P-trap or an S-shaped siphon jet. It creates a vacuum that pulls everything down into the drain, which makes it less likely to clog or leave anything behind. People choose siphonic jet toilets because they have better performance than other toilets. Compared to a regular toilet, they are less likely to leave anything in the bowl when you flush. This can also stop you from having to flush multiple times to clear the bowl.

 

In our research regarding siphonic jet toilets, we considered a large number of variables, including the cost compared to a standard toilet, how well siphonic toilets work, the impact on your water bill, and more. Check out our research articles on siphonic jet toilets to see if it is the right choice for you.

Toilet Model Main Features
TOTO Aquia IV Universal Height – 2 Piece, Elongated, Skirted Trapway, White
  • Minimalist Design
  • 2-Piece Elongated Toilet
  • 0.8 GPF, 1.28 GPF
Read Review
TOTO Aquia IV Standard Height – 2 Piece, Elongated, Skirted Trapway, White
  • Minimalist Design
  • 2-Piece Elongated Toilet
  • 0.8 GPF, 1.28 GPF
Read Review
KOHLER Memoirs Wall Hung – 1 Piece, Elongated, Skirted Trapway, White
  • Modern Design
  • 1-Piece Elongated Toilet
  • 1.6 GPF
Read Review
KOHLER Memoirs Wall Hung – 1 Piece, Elongated, Skirted Trapway, Black
  • Modern Design
  • 1-Piece Elongated Toilet
  • 1.6 GPF
Read Review

What is a Siphonic Jet Toilet?

A siphonic jet toilet is a toilet whose drain is designed to provide a higher level of suction so that it easily clears the bowl every time. The drain has a distinctive shape that creates a siphon when water rushes through it. This siphon does a better job of pulling things out of the bowl than a standard, straight-drain toilet.

How Does a Siphonic Jet Toilet Work?

A siphonic jet toilet works almost exactly like a standard toilet except in how the drain works. You still flush it the same way as a standard toilet. In fact, you don’t have to do anything different. The difference is in the shape of the drain, which functions like a siphon that sucks everything in the bowl down the drain. It gives you better performance than a standard toilet without changing anything else.

What’s the Difference Between Gravity Flush and Siphon Jet?

Gravity flush and siphon jet toilets work the same way: water is flushed down the drain and takes the waste with it. Siphon jet toilets create a stronger pull than gravity flush toilets, which means they clear it out better. Gravity flush toilets just drop the water down a pipe.