Usually 1 8 per foot is plenty for drainage this is the same as the commonly recommended 1 slope.
Gutter drain pipe slope.
The easiest way to dig the.
The trench should be at least 6 inches wide and slope down slightly 1 to 2 inches per length of pipe so water drains away from the downspouts.
Measure and plan the first step is absolutely crucial to figuring out the slope.
For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e.
Assemble and place the catch basin.
Note that i said the drain pipe must be sloped rather than the french drain.
Now that the trench is dug you can assemble the catch basin.
The flexible design easily bends and holds its shape and can be extended from 25 in.
A slope of less than 1 4 inch per foot will cause constant drain clogs and a slope of more than three inches will allow the water to drain without the solids.
Do not connect the gutter drain pipe to the perforated foundation drain pipe.
All of your drain pipe with one exception must slope slightly downhill.
Purchase pipe once you have determined the route of the line you can figure out the pipe lengths you ll need to.
Calculating the slope of your drain pipe is easy.
Dig trenches for drainage pipe.
The standard slope for rain gutters is half of an inch for every 10 feet.
Figure out the slope.
According to plumbing code drain pipe has to be sloped a minimum of 1 4 inch per foot and a maximum of three inches per foot or vertical.
Measure and plan 1.
This means that your gutter should be a half inch lower in height at every 10 foot mark until you reach the downspout.
This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end.
This practice will soak the foundation see figure 4.
Depending on the trench length and more important the type of soil digging the trench with a shovel can range from relatively easy to downright impossible.
Bury the drain pipe at a slope consistent with the final grade around the home i e sloped 0 5 inch per foot away from home for 10 feet.
As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering.
Underground gutter drainage step 1.
Measure the drain line distance.
Continue until you have completed the trench.
Use this downspout extension to divert water away from the foundation or connect to drainage pipe and catch basin to control drainage.