top of page
  • Writer's pictureChris Maddern

Resolving Waterlogged Lawns: Installing a French Drain with AG Sleeved Pipe


A healthy, lush lawn is a sight to behold, but having one requires more than regular mowing and watering. Proper drainage is just as critical, ensuring that water is effectively transported away from your yard to prevent pooling and waterlogging. Grass that retains too much water can lead to a range of problems, such as root rot, stunted growth, and an increase in mosquito breeding. It can also compromise the overall integrity of your yard. One effective solution to such problems is the installation of a French drain, especially using AG sleeved pipe and blue metal.

Understanding the French Drain

A French drain, named after Henry Flagg French, its inventor, is a simple yet ingenious system that redirects excess water from a particular area to another, using the principle of gravity. This system is often used in yards and gardens to alleviate soil saturation and prevent water damage to building foundations.

The traditional French drain system consists of a trench filled with gravel or rock, enclosing a perforated pipe that redirects the water. The newer and more effective method employs an AG (Agricultural Grade) sleeved pipe, which is not only durable but also wrapped in a geotextile fabric to prevent the infiltration of soil and silt.

Installing a French Drain with AG Sleeved Pipe and Blue Metal

Materials Needed:

AG sleeved pipe

Blue metal


String line and stakes


Drainage pit or collection area

Turf mix


Step-by-Step Guide:

Step 1: Plan the Layout

Firstly, identify the waterlogged area and determine where you want to redirect the water - typically, a drainage pit or another part of your property where the water won't cause problems. The French drain should have a slight slope from beginning to end to effectively utilize gravity in water drainage. Use a string line and stakes to mark the route for your drain.

Step 2: Dig the Trench

The next step is to dig a trench along the line you've marked. The depth and width of the trench will depend on how much water you need to drain, but a typical size is around 18 inches deep and 12 inches wide.

Step 3: Lay the Pipe

Before laying the pipe, add a layer of blue metal at the bottom of your trench. Blue metal, also known as crushed basalt or aggregate, is a strong and drainage-friendly material. It will provide a solid base for your pipe and improve the drain's overall water flow.

Then, lay your AG sleeved pipe on top of the blue metal, ensuring that it's sloping towards the drainage pit. This pipe is specifically designed for sub-soil drainage, with the sleeve acting as a filter to prevent clogging.

Step 4: Fill the Trench

After laying the pipe, fill the trench with more blue metal until it's almost full. This will further facilitate water flow into the pipe from the surrounding soil.

Step 5: Apply the Turf Mix

The next step is to apply a turf mix, which is a combination of topsoil, compost, and sand. It provides a nutrient-rich layer for your turf to root in and allows for better drainage. Fill the remainder of the trench with the turf mix.

Step 6: Lay the Turf

The final step is to lay your chosen turf over the filled trench. Be sure to keep it at the same level as the surrounding ground for a uniform appearance.


Waterlogged grass can be a significant problem for homeowners, but with a French drain system, it's one that can be effectively addressed. By using an AG sleeved pipe, blue metal, and the right turf, you can improve your lawn's drainage dramatically and maintain a beautiful and healthy yard. Just remember, the key to a successful French drain system lies in its design and installation. Plan carefully, ensure a gentle slope, and your yard will thank you, come rain or shine.

4 views0 comments

Recent Posts

See All

Adelaide, the capital city of South Australia, enjoys a Mediterranean climate, which means that it experiences hot summers, mild winters, and low to moderate rainfall throughout the year. If you're a

bottom of page