How do I choose the right drain pipe for my drainage system?

Hey, Dr. Drainage here to help you select
the right drain pipe for your project. The first step to solving any drainage problem
is to determine how much water needs to be managed. I provide step by step instructions on how
to calculate runoff in my “How to Calculate Runoff” video. You need to know how much water your drain
pipe is able to handle in order to select the right drain pipe for your project. Let’s begin. How to Determine What Drain Pipe to Use
There are many different types of pipe. The most common pipes that are used for drainage
are plastic corrugated pipe and smooth wall PVC pipe. An table that provides more information about
the advantages and disadvantages of these pipes can be found at An online pipe flow calculator that will calculate
your runoff and tell you what size pipe you need has been developed. Flow capacities in pipes are determined by
the diameter of the pipe and the slope of the pipe. How to Use the calculator – Constant Slope
(found at To determine if a particular drain pipe will
work for your situation, follow the following steps:
1. Enter the square footage of the area the water
is coming from. 2. Select the surface type where the water is
coming from. This is also called the Coefficient of Runoff. 3. Select the 100-year rainfall value in your
area. A rainfall map has been provided to help determine
this value. 4. Select the slope closest to the slope of the
installed drain pipe. For help determining the slope of the drain
pipe, review pages 10-12 of our “Principles of Drainage”. 5. Press the submit button. The tables below Step 6 show the expected
runoff in both gallons per minute and cubic feet per second and what size pipe is needed
to carry the expected runoff. To download the companion guide to this video,
which includes all charts and resources, click here. If you are interested in learning more about
residential storm water drainage or other NDS drainage products, visit our NDS Homeowner
Drainage website, here. Be sure to check out our other that are part
of our “How to Calculate Drainage” series. If you have any questions or suggestions for
another video you would like to see, email me at [email protected] I’m Dr. Drainage, talk to you later.

Leave a Reply

Your email address will not be published. Required fields are marked *