S-Trap Vs. P-Trap And Recommendation

In this blog post, you’ll read:The complex network of pipes beneath our sinks might not be something we think about daily, yet they play a pivotal role in our household's hygiene and functionality. At the heart of this system are the S-Traps and P-Traps—each designed with specific benefits and purposes in mind.

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S-Traps vs. P-Traps: Navigating Their Unique Benefits

The complex network of pipes beneath our sinks might not be something we think about daily, yet they play a pivotal role in our household’s hygiene and functionality. At the heart of this system are the S-Traps and P-Traps—each designed with specific benefits and purposes in mind. Let’s dive into understanding these crucial components, dispelling any myths, and highlighting their unique benefits.

S-Trap: Delving into its Strengths

  • The Design Insight: Named after its distinctive “S” shape, the S-Trap descends vertically from a fixture and then curves upwards before going down again to connect with the floor’s drainpipe.
  • Where It Shines:
    • Optimal for Floor-based Drainage: Typically found in older constructions or specific setups where the drainage outlet is located on the floor.
    • Compact Configuration: Its structure is often more compact, making it suitable for spaces with limited horizontal space.
  • Key Benefits:
    • Secure Seal Creation: Its design retains water after every use, blocking unpleasant sewer gases from emerging.
    • Streamlined Structure: With fewer bends and curves, installing in straightforward setups is often easier.

P-Trap: Harnessing its Advantages

  • The Design Insight: The P-Trap, when visualized horizontally, resembles the letter “P.” It’s crafted with a U-bend that holds water, creating a barrier, and connects to a drainpipe that runs sideways, typically into a wall.
  • Where It Shines:
    • Modern Homes’ Go-To: With changing plumbing codes and designs, the P-Trap has become the standard choice in contemporary constructions, be it for sinks, bathtubs, or showers.
  • Key Benefits:
    • Consistent Barrier Maintenance: The inherent design ensures the water barrier remains intact, offering an efficient blockade against undesirable gases.
    • Flexibility in Installation: Suitable for various fixtures and plumbing configurations, especially where pipes run through walls.
    • Ease of Cleanup: Designed for the modern homeowner, many P-Traps come equipped with easy access points for hassle-free maintenance and unclogging.

In the grand orchestra of plumbing, both S-Traps and P-Traps play their unique tunes. While the S-Trap is reminiscent of older, floor-based drainage systems, the P-Trap resonates with the demands of contemporary home designs. Their choice often boils down to specific installation needs and regional plumbing standards. Regardless of the type, the core principle remains: providing a barrier against sewer gases and ensuring our homes remain fresh and hygienic.

What is an S-Trap Toilet?


S Traps (S-Trap) is a type of toilet that uses two water seals, one at the top and one more at the bottom of the bowl. The seal at the top traps sewer gas, while the seal at the bottom prevents sewage from backing up into the bathroom.

S-drain traps are a popular choice for households with septic tanks, as they help prevent effluent from entering the tank and causing it to fill up too quickly. They are also popular in areas with a lot of clay in the soil, which can cause sewage to go back into people’s homes.

What is a P-Trap Toilet?

A P-trap toilet is a type of toilet that utilizes a plumbing trap to prevent sewer gases from entering the home. The “P” in “P-trap” stands for “pipe,” and the “trap” is the curved section of pipe that connects the drain from the sink or tub to the main drainage line.

The curved section of the pipe forms a watertight seal, which prevents sewer gases from entering the home.

p trap works
p trap works

How to do S-Trap Toilet Work?

S-Trap toilets work by using a siphon system to suck the waste out of the bathroom and into the sewage line. The system works when water from the tank flushes down and enters the bowl. This creates a vacuum or siphon that sucks the waste out of the toilet and into the sewage pipe.

How does P Trap Toilet Work?

P traps trap water in the pipe’s bend so it cannot flow back out of the drain trap. The water creates a seal that helps to prevent sewer gas from escaping into your home.

The P trap is also a plumbing trap, U-bend, or S-bend. It is named for its shape, shaped like the letter P when viewed from above. Most plumbing traps are made from PVC pipe, but some are made from cast iron.

Which Type of Toilet is Better: S-Trap vs. P-Trap

There is no definitive answer to this question. Each type of toilet has its own set of pros and cons.

An S-trap toilet is more compact, which can be beneficial if limited space exists. However, an S-trap toilet can also be more challenging to clean due to the tight corners in the bowl.

A P-trap toilet is more accessible to clean than an S-trap toilet because the bowl has no tight corners. However, a P-trap toilet takes up more space than an S-trap toilet bowl.

metal s strap and p trap
metal s strap and p trap

Pros and Cons of S-Trap Toilet


  • They are more efficient in terms of water usage than traditional toilets.
  • They are easier to clean than conventional toilets.
  • They do not require a septic tank, which can be expensive to install and maintain.
  • They do not produce any odor.


  • Some people find the S-trap design aesthetically unappealing.
  • It can be more challenging to install than traditional toilets and may require a plumber’s services for installation.’

Pros and Cons of P Trap Toilet:


  • It prevents the sewer gasses from entering your home through the plumbing.
  • It makes it easier to unclog a toilet since the clog is more likely to be in the trap and not deep in the sewer line.


  • If you have a septic tank, you may not want to use a p-trap toilet because the water in the trap can cause your tank to fill up too quickly.
  • If you have ever cleaned out a p-trap, then you know that it can be a disgusting job!
Spare parts of P trap
Spare parts of P trap

How to Decide Which Type of Toilet is Right for You?

There are a few things you’ll want to consider when deciding which type of toilet is right for you:

  • How much space do you have in your bathroom? Some toilets are more significant than others.
  • How often do you need to use the toilet? Some toilets are more efficient than others.
  • What’s your budget? Some toilets are more expensive than others.

Once you’ve answered these questions, you can start narrowing down your choices. For example, a compact or corner toilet might be a good option if you have a smaller bathroom.

An efficiency model might be best for you if you frequently need to use the toilet. And if money is no object, a luxury model could be just what you’re looking for!

Installation of traps
Installation of traps

Best S Traps That We Recommend

Ciencia Sink Trap Brass S Trap

The Ciencia Sink Trap is our top pick for the best S trap. It’s made of brass and polished chrome, which makes it rust-resistant and non-corrosive.

The smooth interior won’t cause buildup or bad odors. The trap’s 1-1/4 inch inlet adapts to 1 1/4″ sink drains.

The S trap design is not only space-saving but also less cleanout and won’t clog. The floor-mounted installation type has a flange for connection to the floor.

Overall, this is a high-quality S trap that is sure to serve you well for many years to come.

Vataler 1-1/4 Inch Expandable Flexible S Trap

The Vataler 1-1/4 Inch Expandable Flexible S Trap is our top pick because it is easy to assemble and can be used for any shape or space.

Its innovative design features a visual check valve that makes it easy to see if the drain works properly. Its rubber hedging design also ensures a good seal, making it perfect for preventing leaks.

We also recommend using the Vataler pop-up drain for an added level of protection against leaks. A 100% satisfaction guarantee backs this product, so you can be sure you’re making a good investment.

Eastman 35304, White S-Trap

If you’re looking for an S-trap that will stand the test of time, the Eastman 35304 is a great option.

Constructed of high-impact polypropylene plastic, it’s designed for use in tubular drain applications and equipped with a captive nut on the j-bend for quick and easy installation.

It’s also compatible with 1-1/4 inch pipes, so you can be sure it will fit your needs.

Plumb Pak 700WK S Trap

This product is highly durable and easy to use, making it an excellent choice for homeowners looking for an easy installation. The S-trap is perfect for kitchen or lavatory use, and the inlet is 1-1/2 inches or 1-1/4 inches.

The length of the trap is 20-1/2 inches, and it has a slip joint with a 1-1/2-inch x 1-1/4-inch reducer washer.

The white polypropylene finish makes this product easy to match your existing fixtures, and a 1-year warranty backs it.

Master Plumber 480-145 MP Lavatory Floor Drain S-Trap

Master Plumber 480-145 MP Lavatory Floor Drain S-Trap is an excellent option if you need a new S-trap for your lavatory or kitchen.

It is made of white plastic and includes a nut and washer for easy installation. Plus, it comes bagged to keep everything together.

Whether you’re doing a repair or need a replacement, this S-trap is a good choice.

Flexible waste S trap hose
Flexible waste S trap hose

LASCO 03-4339 White Plastic Tubular 1-1/4-Inch S-Trap

The LASCO 03-4339 S-Trap is excellent for your bathroom drains. This product is made of high-quality white plastic and has all the nuts and washers. The PVC Lavatory floor drain s-trap has a modern design that will complement any bathroom décor.

This product is easy to install and comes with detailed instructions. The LASCO 03-4339 S-Trap is excellent for your bathroom drains.

Best P Traps That We Recommend

PF WaterWorks PF0704 FlexTRAP P Trap

The PF WaterWorks FlexTRAP P Trap is our top pick because it is made from durable stainless steel and has a limited lifetime warranty.

The accordion design can be extended from 10″ to 13″, making it a good choice for installations where space is limited. It also has reducing gaskets to fit 1-1/2″ and 1-1/4″ structures, making it a versatile option for various applications.

The FlexTRAP is an excellent choice for those looking for a reliable P trap that can be used in various settings.

EasyDrain Ref. 510 Expandable & Flexible 1-1/2″ P-trap

The EasyDrain Ref. 510 Expandable & Flexible P-trap is our top pick because it is easy to remove for cleanup and clogs, has a valve – 1-1/2″, and is expandable & flexible.

This P-trap has a minimum length of 13″ and a maximum length of 28-1/3″. It is made of durable ABS plastic and comes with a 5-year warranty. Installation is quick and easy, with no tools required.

The EasyDrain Ref. 510 Expandable & Flexible P-trap is the best P-trap on the market, and we highly recommend it.

Keeney 200IPK Insta-Plumb Fit P Trap

The Keeney 200IPK Insta-Plumb Fit P Trap is our top pick for the best P traps because it is easy to install and can be adjusted or removed.

The press-to-release collar makes it easy to align the trap, and the integrated press-to-release collar can be repositioned or rotated for alignment.

The kit includes everything you need and is perfect for bathroom installations.

Fix leakage of bottle P trap.
Fix leakage of bottle P trap.

Orhemus Brass P Trap

Oremus Brass P Trap is one of the best P traps we recommend. It is made of heavy-duty solid brass and is durable for lifetime use. The kit includes the extension tube for extending the lavatory drain tailpiece to the trap.

It is an inlet waste pipe tubular drain connection, adjustable, and can be the trap adapter to adjust the height to connect your sink drain and the p-trap. And it is constructed of solid brass to provide extra strength and durability.

The other features of this P trap are that it has a standard size with flange and elbow and comes with all the necessary installation hardware. This product is also easy to install and clean.

Wrapping Up:

In conclusion, an S-Trap toilet has a U-bend that curves back on itself to create the trap. A P-trap is created when the waste pipe from the sink intersects with the drain pipe from the shower or bathtub. They prevent sewer gases from entering your home but in different ways. The p trap is suitable for ground floor installations, and the s trap is good for the air admittance valve.

So, which one should you choose for your home? That depends on what’s available and what will work best for your needs.

Hofen Sanitary has more than 17 years of industry experience, and we can deliver waste within 15 days. Free samples are also available. Now, do you have any questions? Feel free to contact us.

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