Central Oklahoma French Drains- CMGdrainagesysytems@yahoo.com 405-226-0629

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DESIGNING A FRENCH DRAIN OR A DRAINAGE SYSTEM

CMG Drainage Systems, Inc.

(405) 226-0629 DRAINAGE SYSTEMS UTILIZING: FRENCH DRAINS, SURFACE DRAINS, CHANNEL DRAINS, TRENCH DRAINS, BASIN DRAINS, AND SUMP PUMPS.

French Drain Installation

French Drain running from back yard to street

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RSS Drainage Systems and French Drains

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  • French Drain Information, Yukon, Oklahoma City, Norman, Edmond March 10, 2015
    The term, “French Drain” gets thrown around a lot.  Many times people say they need a “French Drain,” when they mean Surface Drain, or Channel Drain.  It is becoming a Catch-All Phrase that may refer to any type of drain.  French Drains provide specific benefits that are different from Surface Drains. Just what is a […]
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      French Drain Installation —   French Drains are designed to do a lot of things.  If you have an area that has unwanted water standing in it or running across it, a French Drain can be the answer.  A French Drain is a trench that runs across the Drainage Problem Area.  A French Drain Pipe […]
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Designing a French Drain or a Drainage System

 

Angie’s List Customer Service Award Winner        Activerain Member

When I talk to a potential customer while doing a Drainage System estimate, I take a lot of things into consideration.  First I have the Customer show me where water is standing or where it is going that it shouldn’t.  This is part of defining the specific problem area.  Sometimes the Water Problem Area is larger and more involved than the customer realizes.  Once the Water Problem Area is clearly defined,  the next step is to determine how the water is getting to the problem area.  Many times there is more than one Water Source to the Water Problem area.  A big mistake in Drainage System Design is to stop once the most obvious  Water Source is found.  A Drainage System Designer must be a detective to some degree.  For Example:  Water running down the hill and onto the back patio might be the most obvious water source.  Sub-surface water or a neighbor’s new gutter downspout could also be contributing.  Most of the time water gets into the problem area from more than one source.

This is a good place for a French Drain

This is a good place for a French Drain

Next you must decide where to take the water.  This is determining an Exit Point for the Drainage System.  If possible you want your exit point to be down hill from the problem area.  If it is up hill in all directions from the problem area, then the only solution is a Sump Pump.

Once an exit Point is determined, you must ask yourself if there is any way to install two exit points.  Usually this can only work when an exit point can work on both ends of a Drainage System.  The benefit of two Exit Points in a Drainage System is it greatly increases the water capacity for the Drainage System.  It can move much more water faster during a heavy rain than a system with just one Exit Point.  Most Drainage Systems can only utilize one Exit Point.  In 21 years of Drainage System Installation,  I would say 10% of our Drainage Systems have two Exit Points.

Popup Emitter to release water from a French Drain in Yukon

Popup Emitter to release water from a French Drain in Yukon

Next we have to decide what type of drain to install in the problem area.  If it is a small area with one water source, Usually a Surface Drain is best.  If the water problem area is large with one or several water sources, a French Drain is usually installed.

If you have several problem drainage areas you must use larger Drain Pipe if you want to connect them together  to one exit point.  Large French Drains should have their own exit point without attaching other Surface Drains or Gutters to them.  It is very common to connect too many drains or gutters into a Drainage System.  A hard rain can overwhelm the Drainage Systems Water Flow Capacity.  When that happens, water backs up and the problem area floods.

French Drain connected into Drainage System

French Drain connected into Drainage System

I just shake my head when I see 3 French Drains and 5 gutters connected into one exit drain pipe. I see this type of design all the time.  Why spend money for a Drainage System that won’t work?  Lots of Cheap Builders and Fly-By-Night Drainage Companies cut corners on Drainage Systems and French Drains on new home construction.

For a French Drain or a Surface Drain or any type of Drainage System,  If in doubt, use a larger Drain Pipe.  Four Inch Drain Pipe is the most common. Six inch Drain Pipe is always better.   If you are going to connect a French Drain and Surface Drain together, use 6 inch Drain Pipe.

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3 Comments

  1. […] in close proximity to Gutter Down Spouts.  Rather than have water come off the roof and out the Down Spout and on to the ground below, many times it is much better to tie a Gutter Down Spout Directly into a […]

  2. […] inch French Drains across the water’s path.  This allowed the water to be diverted into the French Drain which then ran through drain pipe to a curb outlet at the street.  Three Gutter Down Spouts were […]

  3. […] water come in contact with the French Drain, it seeps down through the stones and into the French Drain Pipe.  It then flows through the Drain Pipe to the exit point.  Typically a French Drain will […]

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