Gutter Drain Pipe 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.
Gutter drain pipe slope. This means that your gutter should be a half inch lower in height at every 10 foot mark until you reach the downspout. 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. 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. Before digging call 811 to have utility lines marked.
The flexible design easily bends and holds its shape and can be extended from 25 in. Underground gutter drainage step 1. For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e. Measure the drain line distance.
Calculating the slope of your drain pipe is easy. Note that i said the drain pipe must be sloped rather than the french drain. Measure and plan 1. Assemble and place the catch basin.
Figure out the slope. As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering. Dig trenches for drainage pipe. 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.
For spans longer than 40 feet it s wise to have a downspout on each end and start the high spot of the gutter in the center. Usually 1 8 per foot is plenty for drainage this is the same as the commonly recommended 1 slope. Continue until you have completed the trench. The easiest way to dig the.
Purchase pipe once you have determined the route of the line you can figure out the pipe lengths you ll need to. All of your drain pipe with one exception must slope slightly downhill. This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end. Now that the trench is dug you can assemble the catch basin.
Use this downspout extension to divert water away from the foundation or connect to drainage pipe and catch basin to control drainage. The standard slope for rain gutters is half of an inch for every 10 feet. This practice will soak the foundation see figure 4. Do not connect the gutter drain pipe to the perforated foundation drain pipe.