Blocked drains are one of the most common household plumbing problems. Whether it’s a slow-draining sink, a backed-up shower, or a stubborn toilet blockage, these issues can quickly disrupt daily routines and lead to unpleasant odours, water damage or costly repairs if left untreated.
Fortunately, many minor to moderate blockages can be resolved without calling in a professional. One of the most effective tools for DIY drain unblocking is the drain snake – also known as a plumber’s auger. It’s a flexible, practical solution that can reach deeper into your pipework than a plunger, breaking up or removing clogs with precision.
However, using a drain snake incorrectly can damage pipes, worsen blockages or even cause injury. That’s why understanding how to use one safely and properly is essential. In this guide, we’ll walk you through everything you need to know to clear your drains with confidence – and without causing further trouble.
What Is a Drain Snake?
A drain snake, also referred to as a plumber’s auger, is a flexible cable tool used to dislodge clogs from within pipes. It works by feeding the coiled wire into the drain and turning a handle to help the cable manoeuvre through bends and break through obstructions. The tool is particularly useful when a plunger is not enough to remove the blockage.
There are several types of drain snakes, each designed for different types of blockages and fixtures:
Hand Auger
This is the most common type for general household use. It consists of a manually operated coil with a crank handle. Ideal for clearing clogs in sinks, bathtubs and showers, hand augers are compact and easy to use. However, they should not be used on toilets, as they can damage the porcelain or become stuck.
Toilet Auger
Also known as a closet auger, this version is specially designed for toilets. It features a shorter, sturdier cable housed in a rigid guide tube that helps navigate the sharp bends of a toilet drain without scratching the bowl. If you are dealing with a toilet blockage, this is the only type of snake you should use.
Drum or Power Auger
These are more heavy-duty versions, often used by professionals. The cable is stored in a drum and powered either by hand or an electric motor. Drum augers are suited to long, tough clogs deep in the drainage system, such as those caused by grease build-up or tree roots. Due to the risk of pipe damage, they should be used with caution and are not recommended for inexperienced users.
Choosing the right type of snake depends on the fixture you are working on and the severity of the blockage. Using the correct tool not only improves effectiveness but also protects your plumbing from unnecessary damage.
Safety First: Precautions Before You Begin
Before using a drain snake, it is important to take a few basic safety measures. Although it may seem like a straightforward tool, improper use can lead to damaged plumbing, messy clean-ups or even personal injury.
Essential Protective Gear:
Make sure you have the following on hand before you begin:
- Rubber gloves – Protect your hands from sharp debris, bacteria and dirty water inside the pipes.
- Safety glasses – Prevent any splashes from reaching your eyes, especially when withdrawing the snake.
- Old towels and a bucket – Useful for soaking up spills or collecting water that may escape during the process.
Avoid These Common Mistakes:
- Do not apply excessive force. If you push the snake too aggressively, you risk kinking the cable or damaging pipework, especially in older or plastic systems.
- Do not use the wrong type of snake. Using a general-purpose snake in a toilet, for example, can scratch the porcelain or make the blockage worse.
- Avoid using a snake in pipes made of soft plastic unless you are certain the tool is suitable. Some augers can crack or pierce lightweight materials.
When to Call a Professional
There are situations where using a drain snake is not advisable at all. If you experience any of the following, it is best to call a qualified drainage engineer:
- Multiple blocked fixtures at the same time
- Persistent foul odours from several drains
- Gurgling noises that indicate a possible main sewer issue
- Repeated clogs that return even after clearing
- Suspicion of pipe damage or root intrusion
In these cases, DIY methods may only mask the problem or cause further damage. A professional inspection and treatment can help avoid costly repairs down the line.
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Step-by-Step: How to Use a Drain Snake for Different Drains
Different types of drains require slightly different techniques when using a drain snake. Below are clear step-by-step instructions tailored for the most common household fixtures.
Sink or Bathroom Basin
Step 1: Prepare the Area
Place a bucket under the sink to catch any water. Use a wrench or your hands to remove the P-trap (the curved section of pipe beneath the basin). Pour out any trapped water and inspect the trap for obvious blockages.
Step 2: Insert the Snake
Feed the tip of the drain snake into the pipe that leads into the wall. Begin turning the handle slowly as you guide the cable forward. If you feel resistance, that is likely the clog.
Step 3: Break Through the Blockage
Rotate the handle steadily while applying light pressure. The snake should work its way through the obstruction. You may feel the cable loosen once the clog starts to break up.
Step 4: Withdraw and Check
Gently pull the snake back out, cleaning it with a cloth as it exits. Check for any debris attached to the head. Reassemble the P-trap, turn on the tap and check whether the water drains freely.
Shower or Bath Drain
Step 1: Remove the Grate
Use a screwdriver to lift off the drain cover. In some cases, it may need to be pried off gently. Remove any visible hair or debris before proceeding.
Step 2: Insert the Snake Carefully
Lower the snake into the drain opening and begin rotating the handle as you feed the cable. You may encounter bends in the pipe – guide the cable gently to avoid it doubling back.
Step 3: Work Through the Blockage
When you feel resistance, rotate the handle firmly to help the cable latch onto or break apart the clog. Continue until the resistance lessens or disappears.
Step 4: Flush the Drain
Run hot water for one to two minutes to wash away any remaining material. This also confirms that the blockage has been cleared. Replace the drain grate securely.
Toilet Drains (Using a Toilet Auger Only)
Standard drain snakes should not be used in toilets, as they can scratch the porcelain or become tangled. Only use a toilet auger, which is designed to navigate the toilet’s bends safely.
Step 1: Position the Auger
Place the tip of the auger into the toilet bowl. The curved guide tube should rest along the bottom of the bowl. Begin turning the handle to extend the cable through the trap.
Step 2: Clear the Obstruction
As the cable meets resistance, continue turning slowly to work through the clog. Avoid forcing the tool, as this could damage the drain or the auger.
Step 3: Remove and Test
Retract the cable by reversing the handle. If the auger brings out any debris, dispose of it properly. Flush the toilet to check if the water drains away quickly and without rising.
Common Mistakes to Avoid
Although a drain snake is a useful tool, using it incorrectly can lead to damage or wasted effort. Avoid these common mistakes to keep your plumbing safe and get better results:
- Using the wrong type of snake. A standard hand auger is not suitable for toilets, and a power auger may be too aggressive for household pipes. Always match the tool to the type of drain and blockage.
- Forcing the cable. Applying too much pressure can damage your pipes or cause the cable to twist and jam. Let the snake work gradually and take your time when encountering resistance.
- Snaking unsuitable pipework. Lightweight plastic pipes can crack or split if handled roughly. If you are unsure what your system is made of, avoid using a snake or speak to a professional first.
- Failing to clean the tool after use. Leaving the cable dirty can lead to rust, odours and hygiene issues. Always clean and dry the snake thoroughly before storing it.
By avoiding these simple errors, you can improve the effectiveness of your drain clearing and reduce the risk of plumbing damage.
When Not to Use a Drain Snake
While a drain snake is a helpful tool for many household clogs, there are situations where using one may not solve the problem and could even make things worse. In these cases, professional inspection and treatment are strongly advised:
- Multiple blocked drains. If more than one drain in your home is slow or backed up, the problem is likely in the main sewer line. A snake will not reach far enough to clear it.
- Recurring clogs. If the same drain keeps blocking again and again, the issue may be deeper or structural, such as collapsed pipework or a hidden obstruction.
- Persistent bad smells. Strong odours coming from drains may point to a blocked soil vent pipe or an issue with the ventilation system, which a drain snake cannot fix.
- Suspected root intrusion or pipe damage. If you believe tree roots have entered your drain or you notice signs of cracked or broken pipes, do not use a snake. You may worsen the damage or push debris further into the system.
In these situations, it is safer and more cost-effective to call a drainage specialist with the right equipment to investigate and resolve the issue properly.
Comments from DrainBoss specialists: In our experience, many persistent or multiple blockages stem from deeper structural issues, like root intrusion or collapsed pipework. Attempting to clear them with a domestic snake can often make things worse. A CCTV drain survey is usually the safest next step.
Maintenance Tips to Prevent Future Clogs
Good habits go a long way when it comes to keeping your drains trouble-free. Most blockages are caused by what goes down the sink or shower without a second thought. Here are a few smart ways to stay ahead of the problem:
Watch what goes down the drain
Grease from cooking, food scraps, coffee grounds, hair and soap residue are all common culprits. Instead of rinsing them away, dispose of them properly in the bin. Even small amounts can build up over time.
Fit strainers in sinks and showers
An inexpensive sink strainer can catch debris before it enters the pipe. Clean it out regularly and you’ll avoid the most common types of clogs.
Flush with hot water
Once or twice a week, pour a kettle of hot water down your sink. This helps loosen any oils or residue stuck inside the pipe and keeps things flowing.
Don’t wait for a blockage
If one drain clogs regularly, it’s worth giving it a preventive clean with a hand snake every 6 to 12 months. It’s easier to deal with small build-up than a full blockage later on.
Stay alert to early signs
Gurgling sounds, slow drainage or unpleasant smells are warnings. Don’t ignore them — early action can save you time and money.
Routine care takes minutes but can save hours of hassle and expensive repairs down the line.
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Should You Call a Professional?
Sometimes, even with the right tools and best intentions, a blockage refuses to shift. If you’ve tried snaking the drain and the problem keeps coming back, or if you’re unsure about what you’re dealing with, it may be time to bring in professional help.
Here are a few situations where calling an expert is the best course of action:
- The blockage is deep within the system and beyond reach
- Multiple drains in your home are backing up at once
- Water is overflowing or leaking around pipe joints
- You suspect structural damage or root intrusion
- You’ve already tried clearing the drain without success
A professional drainage technician has access to high-powered equipment like CCTV cameras, mechanical augers and drain jetting systems. These tools allow for accurate diagnosis and effective treatment without guesswork.
More importantly, professionals are trained to work safely inside all types of pipework, reducing the risk of damage. If you’re unsure or the problem is escalating, it’s often quicker, safer and more cost-effective to let an expert take over.
Comments from DrainBoss specialists: We regularly assist customers who’ve already tried snaking the drain without success. If a blockage keeps coming back or is affecting several fixtures, it’s a sign that expert inspection and professional equipment are needed. Acting early can prevent costly repairs.
Conclusion
A drain snake is a powerful and practical tool when used correctly. It can solve many common household blockages quickly and without the need for harsh chemicals or costly repairs. But like any plumbing tool, it requires care, patience and the right technique to avoid causing more harm than good.
If you are struggling with a stubborn blockage or would prefer expert support, DrainBoss is here to help. We provide fast, fixed-price drain unblocking across Sussex, Surrey, Hampshire, Kent and South London, with no call-out charges and a 5% discount for OAPs and NHS workers. Call our 24/7 helpline on 0330 223 5789 or email service@drainboss.co.uk to book a free consultation.
FAQs About Using a Drain Snake Safely and Effectively
Can I use a drain snake on a toilet?
You should never use a standard drain snake on a toilet. Toilets require a specially designed tool called a toilet auger, which can safely navigate the curved trap without scratching or damaging the porcelain. Using the wrong tool may worsen the blockage or harm your plumbing. Always use the correct auger for each type of drain.
How do I know if a blockage is too serious for a drain snake?
If you have repeated clogs, slow drains throughout your home or foul smells that don’t go away, it could be a sign of a deeper issue like a main sewer blockage or pipe damage. These problems are often out of reach for a domestic drain snake. In such cases, professional equipment like CCTV surveys or jetting may be required. It’s best to call a drainage specialist before the issue gets worse.
How often should I clean my drains with a snake?
For prevention, using a drain snake every 6 to 12 months on problem drains can help remove early build-up before it turns into a full blockage. It is especially useful in kitchens or bathrooms where grease, hair or soap scum tend to accumulate. However, don’t overdo it, as frequent snaking on delicate pipework may cause wear over time. Focus on light maintenance and react promptly to early warning signs.
Is it safe to use a drain snake in plastic pipes?
Yes, but with caution. Plastic pipes can be more prone to cracking if too much force is used or if the snake is not suited to the job. Avoid aggressive turning or pushing, and always use a hand-operated snake instead of a power tool when working with plastic. If you’re unsure about the condition or material of your pipework, seek professional advice.
What should I do after using a drain snake?
Once the blockage is cleared, flush the drain with hot water to remove any leftover debris. Clean the snake thoroughly with warm soapy water and dry it before storing to prevent rust and odours. Monitor the drain over the next few days to ensure the problem doesn’t return. If it does, there may be a deeper issue that needs expert attention.
