How to change the sink trap step by step

The sink trap is one of those parts that you hardly consider until it starts causing problems. It's that curved tube just below the sink that connects the drain to the pipes.

Its main purpose is very simple but vital: to always retain a little water so that unpleasant odors and gases from the pipes do not enter the bathroom.

It also serves as an improvised "filter," trapping small objects that can get into the drain and helping prevent more serious blockages from forming.

Understanding what it is and how it works is very useful before deciding to change thesink trap , because not all models are the same or adapt to every bathroom.

What is the sink siphon used for?

• Block unpleasant odors: thanks to the water that always remains inside, it acts as a stopper against gases coming from the pipes.
  
• Avoid bigger problems: soap scum, hair, or even small objects that stay in the trap instead of passing through the entire system.
  
• Easy cleaning: It can be easily disassembled to remove accumulated dirt without having to touch the rest of the drainage system.

The most common types of sink siphon

When considering replacing your sink trap, it's a good idea to know what models are available on the market:

Tubular siphon

The traditional one, U-shaped or S-shaped. It can be made of plastic or metal, it is durable and simple, although it takes up more space under the sink.

Bottle siphon

It has a more compact, cylindrical design, ideal for bathrooms with small cabinets or limited space. It's very easy to disassemble and clean.

Chrome sink siphon

This one scores the most points in terms of aesthetics. With a glossy, elegant finish, it fits perfectly in modern bathrooms or exposed sinks. Its function is the same as any other, but it also adds a decorative touch.

Why it is important to keep it in good condition

Although the trap doesn't require much maintenance, over time it can accumulate debris, leak, or even break. When this happens, the best thing to do is replace the sink trap to prevent odors and ensure water drains properly. And if you're looking for extra style, choosing a chrome sink trap is a perfect option for giving your bathroom a more polished finish.

Signs that you need to replace your sink trap

The sink trap usually lasts for many years, but sooner or later it starts to give you a hard time. The good news is that it gives you warning before it completely breaks down, and paying attention to these details can prevent a bigger problem in the bathroom. In most cases, the most practical thing to do is to replace the sink trap as soon as the first signs appear.

Bad smells that don't go away

If the bathroom smells bad even after a thorough cleaning, it's likely that the trap is in poor condition or filled with residue that can't be removed with home cleaning. In these situations, the most sensible thing to do is replace the sink trap and forget about the odors.

Leaks under the sink

Another fairly common sign is leaks. Sometimes they start as just a few drops, but if left unchecked, they end up soaking furniture and floors. This usually happens because the seals have worn out or because the trap has a crack. When this happens, the best thing to do is install a new one.

Puddles that just appear

If after using the sink there's always a small puddle on the floor or on the sink cabinet, it's almost certain that the trap is cracked or doesn't close properly. No matter how tightly you tighten it, the only thing that works in these cases is replacing the sink trap to prevent further water leaks.

Water takes time to swallow

When the sink drains very slowly or makes strange noises when draining, it's usually due to a blockage in the trap. If a thorough cleaning doesn't fix it, the easiest thing to do is replace it with a new one to get your draining speed back.

Metal siphons with rust

Rust is quite common on older metal models. Besides being unsightly, it weakens the material. If it's a chrome sink trap, the wear is even more visible because it loses its shine and gives a dated appearance.

Strange noises

Although less common, the trap may also make noises or small vibrations when using the sink. This usually indicates that the parts no longer fit properly, and instead of trying to adjust it a thousand times, it's best to install a new one.

Is it difficult to replace a sink trap?

The good news is that replacing a sink trap isn't too complicated. With basic tools and a little skill, anyone can do it at home without having to call a professional. This shouldn't be confused with a toilet trap, which is more complex and usually requires experience. In the case of a sink, it involves loosening, replacing, and tightening, following a few simple steps without much hassle.

Tools and materials needed to change the siphon

Before getting started, it's a good idea to have everything ready. Although replacing a sink trap isn't complicated, the truth is that it makes a big difference between doing it with the tools at hand and searching for them halfway. The good news is that nothing fancy is required: with a few basic tools, you can remove the old trap and install the new one without too much hassle.

Basic tools

• Adjustable wrench: This is used to loosen and tighten the siphon nuts.
  
• Screwdriver: Some screwdriver models have small parts that are secured with screws.
  
• Bucket or container: when removing the siphon, some water always remains inside, thus avoiding staining.
  
• Cloth or rag: essential for collecting those drops that always end up escaping.

Materials needed

• A new trap: this is the key. It can be tubular, bottle-shaped, or a chrome-plated sink trap if you're also looking for a more aesthetically pleasing look.
  
• Rubber seals: siphons usually come with them, but it doesn't hurt to have a spare.
  
• Teflon tape: helps reinforce joints and prevent leaks.
  
  

Useful tips before you get started

• Measure the space: Not all traps fit the same. Taking measurements of the space and the distance to the drain will avoid disappointment.
  
  
• Check the tube diameter: the most common diameters are 32 mm or 40 mm. Confirming this information saves time and returns.
  
  
• Consider the material: for a sink with a closed cabinet, plastic is usually sufficient. If the trap is visible, a chrome-plated sink trap is the most elegant option.
  
  

Having this in mind from the start makes replacing your sink trap much faster, cleaner, and without surprises.

Preparations before changing the sink trap

Before you start disassembling anything, it's a good idea to have everything ready. These preliminary steps make replacing the sink trap a quick and clean task instead of ending up with water on the floor and loose parts. Spending a few minutes preparing everything saves time and prevents disappointment.

Turn off the water supply

Although the siphon isn't directly connected to the faucet's handles, it's always a good idea to turn them off. This prevents someone from accidentally turning on the water while you're working, which can complicate things.

Empty the old siphon

Water always remains inside the trap, even if the sink hasn't been used for hours. To avoid soaking the floor, it's best to place a bucket or container underneath before loosening it. This way, the water runs directly into the trap, avoiding any need to clean it up afterward.

Protect the work area

When removing the trap, it's normal for some water to splash or some accumulated dirt to come out. Placing a rag or old towel under the sink prevents the unit from getting wet and makes cleaning easier.

Check the new siphon

Before starting, it's worth checking that the new trap comes with all the necessary parts: main body, rubber seals, and nuts. In the case of a chrome-plated sink trap, it's also important to ensure the finish is perfect, free of dents or scratches, as aesthetics are important in this type of model.

Have your tools ready

A wrench, a screwdriver, Teflon tape, a rag, and a bucket to collect the water. These are essential items, and it's best to have them on hand from the start so you don't have to stop mid-job.

Step by step: how to change the sink trap

With everything ready, it's time to make the change. Following a simple, no-hassle procedure, replacing the sink trap is a task anyone can complete at home. You don't need to be a plumber: just have the tools on hand and double-check each step.

Remove the old siphon

• Place a bucket under the sink to collect the water that always remains inside the trap.
  
• Loosen the nuts that attach it to the sink drain and the wall pipe. If they don't come off by hand, use a wrench.
  
• Remove it carefully so that accumulated water does not end up on the floor.
  
• Check that the old gaskets are not stuck to the pipes.

Clean the area before mounting the new one

• Remove any limescale, soap scum, or dirt that may remain on the sink outlet and the wall pipe.
  
• Check that the parts where the new siphon will fit are free of cracks or damage.
  
• Dry the joints well so that the rubber seals fit properly.

Place the new siphon

• Put the rubber gaskets in place to prevent leaks.
  
• Fit the siphon into the correct position, both on the sink side and at the connection to the wall.
  
• Tighten the nuts first by hand and then a little with the wrench, without forcing them too much.

Test the drain

• Turn on the tap and let the water run for a few seconds.
  
• Check the joints to make sure they are not leaking.
  
• If you see any leaks, tighten a little more or put Teflon tape on the threads.

A couple of recommendations

• If it is a chrome sink trap, handle it carefully so as not to damage the shiny finish.
  
• There's no need to overtighten: with the gaskets properly positioned, the seal will be airtight.
  
• Storing the old siphon for a few days can be useful if you need a specific part.
  
  

By following these steps, replacing your sink trap becomes a quick, clean job with long-lasting results.

How to change a chrome sink trap step by step

Chrome traps are often used in bathrooms where the sink is visible, as in addition to fulfilling their function, they provide an elegant touch that complements modern faucets and other metallic details. The process for replacing the sink trap is virtually the same as with plastic models, but it's important to be a little more careful to ensure the chrome doesn't dull or scratch during installation.

What changes compared to a plastic siphon

• Design: aesthetics matter here, which is why any scratch is much more noticeable.
  
• Material: Metal is more durable, but it also marks easily if not handled properly.
  
• Assembly: The steps are the same, although it is advisable to use a cloth or gloves to protect the shiny surface.

Steps to change a chrome sink trap

• Place a bucket under the sink to collect any water left inside the old trap.
  
• Loosen the nuts by hand and, if it's difficult, use the wrench, wrapping the chrome area with a cloth to avoid marks.
  
• Remove the old trap and thoroughly clean the sink and wall pipe connections.
  
• Fit the new chrome trap, place the rubber seals and tighten the joints first by hand and then a little with the wrench, without forcing.
  
• Turn on the tap and let the water run for a few seconds to check for leaks.

Tips to keep it impeccable

• No abrasives: just a damp cloth and a mild cleaner to maintain the shine.
  
• Always dry after cleaning: this prevents limescale stains and water marks.
  
• Check the seals from time to time: if they are replaced when necessary, the trap will stay looking new for longer.
  

In short, replacing the trap on a chrome sink isn't any more difficult than replacing it with a plastic one; it just requires a little more care when handling it. That's enough to ensure a functional drain and, at the same time, a sink with a modern and elegant finish.

Conclusion

At Brikum, we understand that small home repairs are much more enjoyable when they're done right the first time. Replacing yoursink's drain doesn't have to be a hassle if you have the right tools, quality materials, and a simple guide that outlines the steps.

From detecting when your trap is causing problems to choosing the best-fitting model—including a chrome-plated sink trap for those seeking a more elegant finish—everything contributes to achieving a long-lasting, leak-free result.

In our store, you'll find traps, seals, tools, and plumbing accessories designed to make the change hassle-free for both beginners and experienced DIYers. Using the right products will avoid compatibility issues and ensure a clean and functional finish.

If you ever have any doubts, it's best to review the measurements and materials and make sure everything seals properly. And, of course, you can count on our advice whenever you need it.

At Brikum, we don't just offer products; we also support every project so that replacing a sink trap goes from being a pending task to becoming a practical, quick solution, with the peace of mind of having done it right.