8 Slot French Drain Pipe

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8 Slot French Drain Pipe Average ratng: 9,2/10 7098 votes

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  1. 8 Slot French Drain Pipe Fittings
  2. 8 Slot French Drain Pipe For Sale
  3. 8 Slot French Drain Pipe Dimensions
  4. 8 Slot French Drain Pipes
  5. 8 Slot French Drain Pipe Drain

A suitable pipe for most residential French drain systems has a 4-inch diameter. Larger 6- or 8-inch pipes may be utilized, but are most suitable for areas where there is a high volume of water that must be drained quickly.

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8 Slot French Drain Pipe Fittings

Buy Baughman 8 Slot Drainage Pipe Here: French Drain Man – Michigan’s Yard Water Drainage Experts. Masters in the art o. DIY Hack: Quad-Pack Baughman Premium Yellow 8-Slot Drainage Pipe Welcome to the French Drain Man channel. I’m Robert Sherwood and I just want to let you guys know that we are working really hard for all the DIYs out there. We’re making that our mission this year to make sure that you guys are successful. I have a area of my yard that I just put new Zoysia down which has water sit so I need to get it off. I am trying to find the best pipe to use to get this water out via a french drain. The 8 slot pipe that he recommends and sells looks awesome but I can't find it in Georgia. His shipping and handling charges makes it too high of a cost to make.

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Potential drawbacks and alternative drainage solutions

Updated: 1/21/19

French drains can require a lot of effort with only marginal effectiveness for many reasons. Most descriptions of a french drain involve a slotted or perforated pipe, a trench, geotextile fabric and gravel backfill. To operate properly, the drain must have adequate slope and a place to open onto the ground, into a drain pipe or somewhere else where water can exit.

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Unfortunately, this fact oftentimes is overlooked. Properly constructed, french drains will work well to transmit water from the pipe to the exit of the pipe; however, they are not very efficient in dewatering poorly drained soils. Adequate fall means at least 2 ft lower per 100 ft of pipe or 0.25 in. per foot of slope. In many cases, inadequate slope to drain the area is the original problem that usage of a french drain aims to solve.

Once a 4-in. drain pipe is placed underground, it should be covered with 2 in. of soil and attempts should be made to have ample slope to drain the pipe. If these conditions are not met, it would be better to allow the water to drain across the surface. For these reasons alone, a french drain can require a lot of effort with minimal effectiveness.

French Drain Shortfalls

Another reason why a french drain pipe is not always an effective solution relates to the basic properties of water. Water “sticks to itself” by a process called cohesiveness. A simple science class experiment in which a penny is placed on top of a glass of water makes the penny float. It does not really float, but rather rests on the surface tension of the water. Once a drop of soap is placed into the water, the penny sinks because the surface tension gives way to the weight of the penny.

In much the same manner, rainfall sticks to itself and to the surface of soil, gravel, sand or whatever other surface with which it comes into contact. Water would rather stick to something than simply fill a void. Thus, water usually sticks to the gravel in a french drain rather than filling the voids.

In this manner, the only time that the French drain pipe fills with water is when there is enough water to stick to the surface of the gravel and be heavy enough to fill the voids and subsequently push over into the pipe. Once again, there must be enough fall to allow the water to drain out of the pipe; otherwise you are allowing the water to sit underground rather than on top of the ground. Sometimes this is the only way to work with a drainage problem, but it is not the best way because it does not transmit the water away from foundations, structures, pools, patios, etc.

8 Slot French Drain Pipes

A further issue with the structure of a traditional french drain is what is called “blinding” of the geotextile fabric. This is the process by which small particles of clay and silt are stopped by the fabric and, over time, the fabric becomes stopped up and will no longer allow passage of water. When enough sand, clay or silt gets past the fabric, the gravel spaces fill and the effectiveness of the french drain ends. This is why most experts state that a french drain is not a long-term solution to a drainage problem: You have to dig it up and reinstall it every eight to 10 years.

8 Slot French Drain Pipe Drain

What to do when you have a drainage problem? The best solution is to drain the water across the surface using a minimum of a 1.5% to 2% slope. If the water of concern is standing water after a rain event, you may be able to use one of the newer products such as a sand-filled trench with a slotted pipe conveyance. Regardless, you still need to empty the pipe somewhere.

With storm water or surface water from rainfall, runoff or other sources, you will need to use surface runoff (best practice), underground pipes with adequate fall and discharge points or a type of containment and retention or sump system. Without one of these solutions, you run the risk of overtaxing the system and backing up water where you do not want or need it.