When was the last time you gave your drains a thought? From Victorian terraces to modern flats, every home in the UK relies on a well-functioning drainage system for everything, including preventing damp, rainwater removal, and even wastewater removal. But the only time you ask yourself how to unblock a drain outside is when it’s the rainy season or it’s getting clogged.
Keeping your property’s drainage system flowing well is important as it not only allows it to function optimally, but it also helps prevent overflows, floods and creates a clean, safe and comfortable living environment for you and your family.
As a responsible homeowner, safeguarding your property’s drainage system is crucial for the wellbeing of both your home and family. But do you know how to unblock your external drain? Are you lacking knowledge and can only wait to be rescued by a trained professional, or are there other steps you can take to remedy the situation on your own?
In this comprehensive guide, you’ll learn the process of identifying, addressing, and preventing outside drain blockages. We’ll walk you through practical steps you can take yourself, as well as when it’s time to call in the experts. By the end, you’ll be equipped with the knowledge to know how to unblock drains outside, to maintain your home’s drainage system, and safeguard the wellbeing of your family.
What Are the Common Causes of Blocked Outside Drains?
The first step in learning how to unblock outside drain comes from understanding the root cause of drain blockages. Drain blockages can vary from minor issues you can solve on your own like leaves, debris, and grease, to extremely complex issues that require professional intervention such as collapsed and damaged pipes and even environmental disasters like flash floods.
Understanding the root causes of drain blockages will save both your finances and time by helping you determine if the cause is something you can DIY or if you need to call the professionals.
Here are some of the most common culprits of drain blockages.
Leaves and Debris
Autumn is one of the most beautiful seasons, the orange hue, and the falling leaves are a majestic sight but while beautiful to see, leaves can accumulate in drains and cause blockages. They form a thick, impenetrable mat when wet, preventing water from flowing freely. Left to accumulate, they’ll cause overflow and, before you know it, your garden has turned into a muddy bog.
If you live in more urban areas, this problem is only made worse by plastic bags and food wrappers.
Fat, Oil, and Grease
Poured down sinks, these oily substances solidify in pipes, causing or exacerbating blockages. Although these substances are poured down as liquids, as they cool, they solidify and adhere to pipe walls, gradually narrowing the passage for water.
In colder UK weather, this process can accelerate, leading to more frequent blockages during winter months.
Hair and Soap Scum
Hair and soap scum build up almost insidiously in bathroom drains. By the time you notice them, it’s almost too late and they’ve caused blockages that extend all the way to the outside drains. Hair, when combined with soap residue, can form stubborn clogs that are difficult to dislodge without professional help.
Improper Disposal of Non-Biodegradable Items
Wet wipes, sanitary products, and cotton buds are hygiene items not designed to be flushed down the toilet. Unlike toilet paper, these items don’t degrade and can narrow sewage pipes.
These items can accumulate and form large, solid masses that can obstruct entire sewer systems. Such blockages are not only inconvenient for individual households but can also cause widespread problems in local water infrastructure.
Heavy Rainfall and Flooding
The UK’s often wet weather can overwhelm your drainage systems, causing backups and blockages. During intense rainfall, drains can become inundated with water, leaves, and debris simultaneously, leading to sudden blockages.
Collapsed or Damaged Pipes
Over time, pipes can deteriorate, collapse, or become misaligned, leading to recurring blockages. This is particularly common in older properties or areas with soil subsidence issues.
Mineral Build-up
In areas with hard water, mineral deposits can accumulate inside pipes over time, reducing their diameter and making them more prone to blockages.
Construction Debris
If there’s been recent construction work near your property, materials like concrete, grout, or plaster may have inadvertently entered the drainage system, causing blockages.
Now that you have an understanding of the potential causes for clogged drains and the resulting harm, hopefully you can take preventative measures and identify when issues arise before they escalate into major and costly problems.
Can I Unblock an Outside Drain Myself?
In some cases, yes.
You can easily unblock an outside drain on your own by testing any of the methods above if suitable. However, be clear about your limits and recognise when a problem is too big for you to manage on your own and requires a trained professional.
A simple way to know if you need a trained professional is if you’re dealing with persistent blockages, foul odours, or notice signs of more serious issues like gurgling sounds or water backing up into your home. If you notice any of these signs, it’s best to consult trained professionals like Watermains and Drains to help diagnose and resolve complex drainage issues.
How Do You Unclog an Outside Drain?
A blocked outside drain is not quite hell, but it’s very close. The filth, dredge and muck that overflows, the emanating stench from a block drain… Dreadful.
While some situations do require expert intervention, there are several methods you can attempt before calling in the professionals. These approaches aim to teach you how to unblock a drain outside quickly, while saving you time and money.
Hot Water
Start by boiling several litres of water in a large pot or kettle. Then very carefully carry it to the drain opening. Exercise extreme caution to avoid burns. Pour the water directly into the drain hole in a steady, controlled stream.
Using the heat and force of the water, minor blockages caused by grease or soap buildup will be easily dissolved and washed away by this method.
After a few minutes, run cold water from an outdoor tap to check if the blockage has cleared. Repeat the process 2-3 times, if necessary. If there’s no improvement after multiple attempts, move on to another method.
Plunger Technique
Another method you can use if you’re wondering how to unblock a sewage drain is a classic: the plunger. Whenever possible, select a plunger with a flange that folds out from inside the cup. This flange fits well over toilet drains, making it easy to form the necessary suction to clear a clog.
Before plunging, ensure there’s enough water in the drain to cover the plunger’s head. Add some from a bucket or hose if necessary. Position the plunger over the drain opening, ensuring it covers the entire opening to create a tight seal. Push down firmly and then pull up sharply, without breaking the seal. This creates suction that can dislodge blockages.
Plunge vigorously for 30 seconds to a minute, maintaining a good seal throughout. Release the plunger and check if water drains freely. If not, repeat the process. After plunging, flush the drain with water to ensure the blockage has cleared and to wash away any dislodged debris.
Drain Rod Method
The next method in our list of how to unblock a drain outside is to use a set of drain rods you can get from your local hardware store. These typically come in one-metre sections that can be screwed together.
As debris may splash back while you’re unblocking the drain, you should always put on protective gloves and eyewear before starting. Insert the first rod into the drain and push it through until you feel resistance. This is likely the blockage. Once you reach the blockage, rotate the rod while pushing firmly. There are plungers and corkscrew attachments for stubborn blockages, just attach them to the end of your rod. Continue the rotating and pushing motion to break up the blockage. If you feel the blockage clearing, don’t pull out yet, continue pushing the rods through to ensure the entire pipe is clear. Once you’re sure it’s cleared, slowly withdraw the rods, continuing to turn them clockwise.
When you’re done, remove the rods and flush the drain thoroughly with water from a hose or several buckets to clear any remaining debris. If water flows freely, you’ve successfully cleared the blockage. If not, repeat the process or try a different method.
High-Pressure Water Jet
Finally, a high-pressure water jet is a viable option when you’re trying to figure out how to unblock a sewage drain outside, especially for more stubborn drain blockages.
You can rent or purchase a specialised water pressure unit which connects to a standard outdoor tap. Before using the equipment, ensure you have the appropriate protective gear, such as waterproof clothing, gloves, and safety goggles. The process involves carefully inserting the jet nozzle into the drain opening and activating the pressure washer following operating instructions. As the high-pressure water blasts through the pipe, it obliterates and flushes away obstructions. It’s quick and effective, but you should save this technique as a last resort because it can potentially damage older and weaker pipes.
Regardless of which method you choose, remember that safety comes first. Always wear protective gear such as gloves and safety goggles when attempting to unblock drains. If you’re unsure about any of these methods or if the blockage persists, consult a professional drain cleaning service such as Watermains and Drains to find out how we can help. Our team has helped properties in Manchester, Stockport, Warrington and Cheshire quickly and effectively clear their blocked drains.
How to Protect Against Outside Drain Blockages
While it’s handy to know how to unblock a drain outside, taking early measures to prevent blockages from developing is even better. Here are seven tips to help protect your outside drains from blockages:
- Install Drain Guards
This prevents leaves and larger debris from entering your drains, especially crucial during autumn.
- Regular Cleaning
Perform routine cleaning of your drains, gutters, and downpipes, especially during autumn when leaf fall is heaviest.
- Proper Waste Disposal
Educate household members about what should and shouldn’t go down the drains. Avoid flushing non-biodegradable items or pouring fat, oil and grease down sinks.
- Tree Management
For properties with nearby trees, consider regular root treatments or installing root barriers to prevent intrusion into drainage pipes.
- Rainwater Management
Adequate rainwater management through properly maintained gutters and downpipes can also protect against water damage and prevent blockages.
- Regular Inspections
Conduct periodic visual inspections of outside drains. If you catch potential issues early, you can manage them before they escalate into major problems.
- Professional Maintenance
Schedule annual professional drain cleaning and inspection to maintain your system’s optimal condition and identify any underlying issues.
When to Contact a Professional Drain Unblocker
Let’s say you’ve tried every method we’ve shared and more, but still find your pipes blocked – it’s time to get professional intervention. A clear sign you need help is if you have foul odours emanating from drains, or you’re facing simultaneous blockage of multiple drains. Not only that, visible damage to your drainage system, such as cracks, splits, or collapses, always requires expert evaluation and repair. If you’re living in an older property, you might potentially have outdated or deteriorating plumbing systems, requiring a comprehensive assessment and, potentially, extensive work by qualified professionals to ensure optimal functionality and prevent future issues.
When faced with these situations, your best option is to seek professional help from WaterSafe certified companies like Watermains and Drains. We can promptly prevent minor issues from escalating into major problems. Utilising advanced technology like CCTV drain surveys, we accurately diagnose and resolve complex drainage issues.
Maintaining your outside drains is an essential part of home ownership. By understanding the common causes of blockages and equipping yourself with knowledge on how to address minor issues, you can keep your drainage system from disrupting your lives. Remember, while many blockages can be resolved with DIY methods, there’s no substitute for professional expertise when dealing with persistent or complex drainage problems.
Regular maintenance coupled with prompt attention to any signs of trouble will help you avoid costly repairs and ensure your home remains a healthy, comfortable environment. If you’re having drainage issues or notice foul odours, don’t hesitate to give Watermains and Drains a call. Our team of professionals are highly experienced and WaterSafe accredited. Your drains (and your wallet) will thank you in the long run.