Sewer pipe slope Calculator

The sewer pipe slope is must be necessary right, to ensure that sewage flow properly through the pipe, preventing sewage plug and maintaining efficient drainage. Calculate sewer pipe slope.

What is the correct slope for a sewer pipe?

Calculate slope of a sewer pipe. Sewer slope in inches. 

Foot

Pipe Ø 2 1/2" or smaller:

Pipe Ø 3" to 6":

Pipe 8" or larger:

Sewer pipe slope table

What degree slope for sewer pipe? The recommended slope for a sewer pipe typically ranges from 1/4 inch per foot (2% grade) to 1/16 inch per foot (0.50% grade). What is the slope for a 4 inch sewer pipe? Proper slope for 4 inch sewer pipe - 1/8" per foot.

Pipe Diameter	Slope	Slope %
2 1/2" or smaller	1/4" per foot	2.08%
3" to 6"	1/8" per foot	1.04%
8" or larger	1/16" per foot	0.52%

For SI: 1 inch = 25.4 mm, 1 inch per foot = 83.33 mm/m.

What is the proper slope on sewer pipe?

Sewer slope calculator. Sewer slope in cm.

Meters

Pipe Ø 40-50 mm:

Pipe Ø 85-110 mm:

Pipe Ø 160 mm:

Pipe Ø 200 mm:

Sewer pipe is most commonly 50 mm, 110 mm or 160 mm. So for domestic drainage diameter is chose from 50 to 110 mm and for outdoor drainage system diameter is chose from 110 mm to 600 mm. Recommended sewer pipe slope.

Sewer pipe slope table

What is the correct slope for a sewer pipe? Drainage slope away from house.

Pipe Diameter	Length	Slope
Ø 40- 50 mm	100 cm	30 mm
Ø 85- 110 mm	100 cm	20 mm
Ø 160 mm	100 cm	8 mm
Ø 200 mm	100 cm	7 mm

Sewer pipe slopes are often specified as a percentage of the pipe's horizontal run. A common minimum slope for a sewer pipe is 2%, when pipe diameter is 2 1/2" or smaller (1/4 inch per foot or 20.9 millimeters per meter). This means that for every foot of horizontal distance, the pipe drops 1/4 inch vertically. If you prefer to express the slope in degrees, a 2% slope is roughly equivalent to 1.15 degrees. 

What is the proper slope for a sewer line?

Proper slope for 2 inch sewer pipe - 1/4" per foot

Proper slope for 3 inch sewer pipe - 1/8" per foot

Proper slope for 4 inch sewer pipe - 1/8" per foot

Proper slope for 5 inch sewer pipe - 1/8" per foot

Proper slope for 6 inch sewer pipe - 1/8" per foot

How to calculate the slope of a sewer line? The slope of the sewer pipe is crucial because it ensures that wastewater and solids flow efficiently from one point to another, typically from homes or businesses to a treatment plant or a septic system.

The slope of a sewer pipe may also be influenced by site-specific factors such as soil conditions, terrain, and the distance the sewage needs to travel to reach the treatment facility.