Angie’s List has awarded CMG Sprinklers and Drains their top rating for customer service and lists CMG with an “A” rating. CMG Installs Drainage Systems, Lawn Sprinkler Systems and provides Expert Sprinkler System Repair. Our Drainage Systems utilize French Drains, Surface Drains, Channel Drains, and Sump Pumps. Sprinkler Systems installed by CMG use Rain Bird or Hunter Sprinkler Parts. With over 20 years of experience we provide top quality Sprinkler Systems, French Drains, Drainage Systems, and Sprinkler Repair.

French Drain Pipe running to curb outlet in Oklahoma City.
CMG Services all of Central Oklahoma including: Norman, Moore, Edmond, Yukon, Mustang, Oklahoma City, Midwest City, Del City, Blanchard, Newcastle, Purcell and Chickasha.
The title of this blog is,”What is a French Drain?”
CMG Sprinkler and Drain — Servicing all of Central Oklahoma
Many people confuse a Surface Drain with a French Drain.
The picture above is a Surface Drain.
A French Drain is completely different from a Surface Drain. A basic French Drain consists of a Perforated Drain Pipe in the bottom of a trench. The Drain Pipe should have a neoprene sock around the Perforated Drain Pipe. This is to ensure that the Drain Pipe does not become clogged.
The dirt that was taken out to make the trench is hauled away. It is replaced by some type of small stone or gravel depending on what is desired or available. I prefer crushed 1 inch lime stone. It is the most economical option in my area. Pea Gravel or some other type of small stone can work just as well. The lime-stone or gravel is placed in the trench on top of the perforated Drain Pipe and filled all the way to the surface (ground level). In some cases where the French Drain needs to be deep or is being placed in sandy soil, a special trench liner must be placed in the trench before the perforated Drain Pipe or the Gravel are installed. This helps maintain the integrity of the trench over time. It also increases the cost of the French Drain and the amount of time to install it. I install a trench liner in a French Drain about 20% of the time. Most of the time a liner in not needed.
- French Drain March 2011
- French Drains Can Look Great!
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Blane Callen
- This concludes,”What is a French Drain.”
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