What Size Drain Pipe for French Drains? Oklahoma City, Norman, Edmond, Yukon-

Posted: September 10, 2014 in french drain
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WHAT SIZE DRAIN PIPE FOR FRENCH DRAINS?

ads 4inch 6 inch

ADS Drain Pipe, 6 Inch on the left, 4 Inch on the right.

 

French Drains can be decorated with many types of stone

French Drains can be decorated with many types of stone

French Drains can utilize  several types and sizes of French Drain Pipe.  An older type that is not commonly used any more is 4 inch PVC Pipe with large half inch holes drilled in the Pipe.  This doesn’t work very well,   Because the holes are too large and the number of holes in the French Drain Pipe are too few.  Also there is no filter or “Soc” around this particular French Drain Pipe.  If it is used in sandy or loose soil the holes will clog and the pipe will fill up with sand.  PVC French Drain Pipe should be avoided.

ADS French Drain Pipe is much better, the holes are smaller and much more numerous.  It also comes inside a soc that acts as a filter and helps keep sand and debris out of the French Drain Pipe.  It works very well.

French Drain in flowerbed

French Drain in flowerbed

For Small business and Residential French Drains, Four inch ADS Perf/Soc French Drain pipe is adequate and the most common.  It is used for the majority of all French Drains installed.  French Drains can be installed using 3 inch ADS Perf/Soc but many times it is too small and can be overwhelmed by a heavy rain or from a bad design.  (Too many gutter down spouts connected directly into the French Drain, For Example)  Three Inch French Drain Pipe should be avoided if possible.

Six inch  ADS Perf/Soc French Drain Pipe is usually a good idea when possible.  It carries a much larger volume of water.  Six Inch French Drains are rarely overwhelmed.

Installing Gravel on top of a 6 inch French Drain

Installing Gravel on top of a 6 inch French Drain

The Drawbacks to 6 inch French Drain installation are:  1.  The Materials Cost is higher for six-inch French Drain Compared to Four Inch Pipe.
                                                                                                                    2.  Many times 6 Inch French Drain Pipe is too large for many applications, Such as going under a fence or sidewalk.  
                                                                                                                   3.  The trench for a 6 inch French Drain must be much larger than a 4 Inch
                                                                                                                   4.  The amount of gravel or limestone or River Rock used to Cover the 6 inch French Drain is Much larger
 
All things being considered, the performance and longevity of a 6 inch French Drain is well worth it if you are trying to protect something of value to you!  If the higher cost and the additional labor and materials are not a problem and 6 inch French Drain pipe is not too big for what you want to do then a 6 inch French Drain would be the best.  
 
 

French Drain Installation Or Do You Need A Surface Drain?

Many Folks don’t know the difference.   Actually there are many differences and a few similarities.  One difference is, a French Drain takes in a larger amount of water into the drain Pipe than a Surface Drain.  There are advantages to Surface Drains as well.

 

A French Drain Is a Perforated Drain Pipe in a Trench with Gravel or Limestone covering the trench with the pipe.  Many times there is a “Sock” around the pipe to act as a filter.

Oklahoma Drainage and Sprinkler Repair — Installing – French Drains – Surface Drains – Channel Drains – Sump Pumps

Providing Expert Sprinkler RepairBroken Sprinkler Pipes Sprinkler Head AdjustmentSprinkler Valve Replacement

Servicing all of Central and Western Oklahoma since 1993.

French Drains as part of a Drainage System – 

Many times people use the term ” French Drain” as general name for a Drain used in or around your home.  French Drains are designed to move a lot of water over a large flooded area.  They are also designed to take water in on the surface of the ground or below the surface of the ground.  This is very important if the water coming into the flooded area is moving through the ground or coming up from underneath.  ” Sub Surface Water Movement.”  The picture below is not a French Drain!

A French Drain looks like this

A French Drain Can Handle Standing Water

A French Drain can take in water in a broad area.  It can move a much larger volume of water compared to a Surface Drain.  Also, it can move sub surface water moving into the area where a Surface Drain won’t move any water at all.

Surface Drains are designed to move surface water only on a smaller scale in confined areas.

Each solves specific drainage problems.  A Drainage System may use one or both together or even several using many types of drains.

Do you have standing water in a large area in your yard?  Typically this calls for a French Drain.  A French Drain is a great way to control standing water in a large grassy area.  It can also protect areas from flooding to a certain degree.  As long as the French Drains capacity to move water is not exceeded.  If the French Drains capacity is exceeded then water will stand in the drainage area until the rain stops and the drain has time to catch up.  A good way to prevent this is to install a bigger French Drain with a larger pipe.  The difference between a 3 inch French Drain and a 6 inch French Drain is huge.

Another way to beef up a French Drain is to connect gutter down spouts in front of the French Drain.  The water coming off the roof causes suction in the French Drain Behind it.  This greatly increases the French Drains ability to move water without increasing the size of the French Drain Pipe.

Gutter Downspout Connected to 6 Inch French Drain

 

Oklahoma Drainage and Sprinkler Repair recently diagnosed a Drainage Problem in  South Oklahoma City.  The Home owner had a sump Pump in their basement that was fed from a French Drain outside the Basement Wall.  The French Drain was 14 feet down along the Stem wall of the house.  The French Drain Pipe was cheap and had collapsed.  We brought in a Mini Excavator and dug up the pipe and replaced it with Durable ADS 4 inch perf/soc French Drain pipe.  In the end, we were able to dig up the pipe and Replace it.

New Trench for French Drain

Next we installed a new exit for the water by installing a curb fitting.

No more flooding in the customers basement.  A few weeks later our customer was able to lay carpet in the basement with no problems.

 
Comments
  1. […] may utilize: French Drains, Surface Drains, Channel Drains, Trench Drains, Basin Drains, and Sump Pumps.  In the past 21 years, we have installed French Drains to keep water away from home and business […]

  2. […] may utilize: French Drains, Surface Drains, Channel Drains, Trench Drains, Basin Drains, and Sump Pumps.  In the past 21 years, we have installed French Drains to keep water away from home and business […]

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