What is the purpose of an S bend in a kitchen sink pipe?

A trap is length of pipe with a curve that bottoms out with a “P” or “S” shape. The curve holds a pool of water that seals out gases rising from the sewer side of the pipe.

Why are S traps bad?

But why is the S trap illegal? The “S” trap is prohibited under the Uniform Plumbing Code throughout the United States. This is because the “S” trap will siphon or suck water out from the trap which will end up releasing methane (sewer) gases into the home.

Does an S trap need a vent?

It allows sewer gases to escape to the outside through a vent pipe, which extends above the roof. Without a vent, an S-trap can allow the water in the fixture to drain so quickly that it often siphons the trap dry and exposes the room to sewer gases.

Which is better S-trap or P-trap?

P-traps are generally considered by most to be more effective and consistent in maintaining water trap compared to S-traps. Their design makes them less vulnerable to drying out and losing seal: a properly installed P-trap will never lose its water seal.

Why are S-traps still sold?

Your Home Inspector just called out an S-trap. In more recent years, most plumbing codes banned S-trap configurations in favor of P-trap style fixtures. S-traps are no longer used in modern plumbing because the water can be sucked completely out of the trap allowing sewer gas to enter your home.

Where is S-trap used?

S Trap: This trap is similar to the P. trap and is used for fixing water closets in toilets. The only difference between the P trap and the S trap is that the P trap is used for an outlet through the wall, whereas S-trap is used for an outlet through the floor.

How do you remove a S-trap?

How to Remove a Sink Trap

1. Back. Next. Place a bucket under the trap (before taking it apart).
2. Back. Next. Unscrew the metal slip nuts a half turn or so, so that you can finish loosening them by hand.
3. Back. Next. Scrape out any blockage from the trap.
4. Back. Next. Scrape out any blockage from the trap.
5. Back. Next.

Are s traps illegal in Australia?

Are S Traps Illegal in Australia? While all S traps are prone to the same type of problems, there isn’t a strict law prohibiting you from installing them in Australia. In fact, this is the most common type of waste traps there.