How to Unblock Outside Drain?

Image presents How to Unblock Outside Drain?

Blocked drains are one of the most common problems for domestic properties, some times we must call a professional plumber to get rid of this draining problem. An outside drain that is blocked can be frustrating. They build waste backlogs and also produce very foul smells.

Usually, in the narrower pipes of your house, you can get blockages, such as those in sinks or toilets. Inside external drains, however, debris may also build up, causing them to become clogged. which causes drain blockage.

Does your drainage system have a foul smell coming out of it? Does it take a long time to drain your wastewater? Then it could be because of your drain blockage. Are you frustrated with the drain blocked and searching for a solution to it then, we are for you to provide you with how to unblock an outside drain blockage and its causes?

Why do outside drains get blocked?

When soil, leaves, branches, moss, and other outdoor debris get into it the most common reason for a blocked exterior drain. They accumulate with time and rainwater converts them into mud.

Give it enough time and there will be a blockage before you know it. This can completely halt your draining system as can cause over flooding

What are the signs of the outside drain being blocked?

  • An unusual smell from your drains.
  • Water rising and overflowing from your toilet drainage.
  • Your sink takes longer to clear from the sink.
  • Gurgling sounds from the pipes.

What are the causes of drain blocks?

Foreign Objects Flushed Down the Toilet

Blocked drains are one of the most common problems for domestic properties, the flushing of foreign objects down the toilet.

Things like wrappers, baby diapers, sanitary pads, etc cause one of the most common blocked drain problems. So, your external blockage might be linked to the internal factors happening inside your house.


To prevent throwing unwanted things on the toilet we can keep a dustbin near the toilet so that people can throw waste in it.

Leaves and Other Outdoor Debris

The causes of drain blockage are often unknown to many people, but leaves and outdoor debris can also cause you to be outside the drainage block.


cover the drain entrance with a filter and drain guards. clean your filters from time to time.

Tree Root Intrusions

In your drainage system, even the slightest cracks or leaks will attract tree root entry, promoting tree roots to expand their way within your plumbing system.


The easiest way to monitor your drains is by hiring a professional to do a CCTV survey.

Food Remains and Waste

Food remaining is a common cause of blocked drainage. keep plastic bags near your kitchen tap and can throw your food and other waste in that bag.


Avoid throwing food remains and waste in the drainage.

What are the tools and chemicals required to unblock outside drains?

  • Screwdriver
  • Rope
  • Drain Rods
  • A Garden Hose(flexible tube used to convey water.)
  • Caustic Soda or Drain Unblocker
  • A Carrier Bag
  • Bleach

How to unblock an outside drain blockage?

Has your property become clogged with an external drain? here we are with some tips and solutions. how to unblock it yourself

Step 1: First of all, make sure where is your problem (Determine the Problem)

Step 2: Collect all the necessary tools requires, like a screwdriver, drain rods, rope, etc. Sometimes you might need some extra equipment as well.

Step 3: Remove the Drain Cover with help of a screwdriver if not then there may be a handle to grip to pull it out.

Step 4: After pulling out its cover, Is the chamber in the drain filled with water?

If so, somewhere after the chamber, the blockage would take place. However, if the chamber is empty, the blockage is in front of it. Try to find a chamber that is between a complete one and an empty one by working your way down the chamber.

Step 5: Further, grab the drain rods that you will need drain rod that plays a vital role here,
simply plunge the rods into the drain chamber using safety measures and continue to go until you feel that you have dislodged any kind of blockage.

Be sure that you have worn gloves on both hands, go slowly, rotate the rod in clock directions, and hardly force them along, this will loosen the grippings finely and make it easier for you to operate.

Step 6: Once you’ve removed the blockage and water is flowing through your outside drain again, it’s worth spending a bit of extra time making sure that the problem doesn’t come back.

How to unblock an outside drain blockage using caustic soda?

Step 1: Pour 2-3 tablespoons of caustic soda into the drain.

Step 2: Next, add water and let the soda fizz away. Completely!

Step 3: The debris that caused the blockage has now get risen to the top add more water and dissolve the debris which has found its way to the surface.

When to call a plumber?

A plumber is fixing blocked drains at regular intervals. A professional plumber, therefore, has a lot of experience in solving any problem efficiently and safely. What also seems to be an ‘easy’ closed drain to the uninitiated might in fact be more complex than what appears to be and possibly requires an expert’s attention.

So, the best way out of this problem is to be in touch with your local plumbing professionals and get the issue addressed as soon as possible.

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