How to Put in a Drainage System


Get Your Drainage Sorted and Save the Foundations

If you have a bad drainage system within your garden or house, it will destroy your landscape. Apart from killing your plants, it also causes erosion, create puddles in your house compound, plus also create frequent flooding that will in the end become a threat to the foundation of your house. For those of you who want to install a basic drainage system, at least you need to build underground pipes that would be able to carry excess water away from being saturated within your house compound to the main drainage outlet.

To put in a drainage system, you need:

  • Landscape paint
  • Board
  • Shovel
  • Gravel
  • Rake
  • Bubble level
  • Perforated drainpipes
  • T connectors
  • Elbow connectors
  • Drainpipe sock
  • Landscape fabric
  • Sand
  • Grass seed

How to Put in a Drainage System

  • The first thing that you need to do is to determine any of the areas within your house compound where puddles of water remain every time after rainy day.
    • You should also check if there are any patches of erosion and soft, waterlogged areas.
    • You should make a layout or basic diagram of your garden and create marker on the affected problem areas.
    • Then, you need to draw a path through the affected areas so that the excess water can go through to a safe drainage outlet like a street gutter.
Move Smoothly into the Drain

The most important thing in designing a drainage system is to ensure that the water would be able to move smoothly from the surface and into the drain.

Then, you need to mark the course of the path using landscape spray paint, tracing the wood board’s side in order to make sure that the lines are straight.

  • Next step that you have to do is to dig 25 cm wide and 60 cm deep of drainage canal with a shovel just by following the course that you have marked with spray paint earlier.
    • You should begin at the far end of your outlet; dig a slight slope into the bottom of your canal enabling the water to flow toward the outlet. You need to create a decline of at least 10 cm for every m of length.
  • After that, pour 15 cms of gravel into the canal before you start to rake it into a shallow dip
    • This is to make sure that the deepest point runs down the center.
    • In order to maintain the slope, you have to set a bubble level right at the center and also adjusting the gravel.
  • The next step is for you to lay rigid perforated drainpipes at the middle of your canal.
    • You also need to attach straight lengths with T connectors or elbow connectors if there are any canal curves.
    • Then, you need to turn the perforations downward and also slip a drainpipe sock over the pipes so that it will be protected against debris.
  • Then, take at least 15 cm of clean gravel and pour it over the drainpipes.
    • You must rake the gravel into a shallow dip.
    • After that, take a landscape fabric and lay it over the bottom and the slope walls in order to block large debris from being able to seep down.
  • Some of the soil that you have removed after digging the canal can be used by mixing them together with an equal amount of sand so that you can fill the remaining section of the canal.
    • By using sand, it will help makes the soil more absorbent so that the water will immediately penetrate into the pipes.
  • Finally, you need to seed the top using flood-resistant grass
    • For instance, use Bermuda or reed grass which has the ability to prevent your soil from eroding and also help slow down the flow of the water runoff.

Always Remember

Whenever you want to gravel or small stone for your drainage system you should distribute at least 6 to 8 cms of the gravel or small stones along your drainpipes and try to do it in an evenly manner.

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