Enter the time it takes for water to drop and the drop distance into the calculator to determine the percolation rate. This calculator helps in evaluating the absorption rate of soil for septic system design.
Percolation Rate Formula
The following formula is used to calculate the percolation rate:
PR = T / D
Variables:
- PR is the percolation rate (minutes/inch)
- T is the time for water to drop (minutes)
- D is the drop distance (inches)
To calculate the percolation rate, divide the time for water to drop by the drop distance.
What is a Percolation Test?
A percolation test, commonly known as a perc test, measures how quickly water drains through soil. This test is essential for designing septic systems and other drainage solutions. It helps to prevent system failures by ensuring the soil has adequate absorption capacity for the effluent from a septic system.
How to Calculate Percolation Rate?
The following steps outline how to calculate the Percolation Rate:
- First, determine the time for water to drop (T) in minutes.
- Next, measure the drop distance (D) in inches.
- Use the formula from above = PR = T / D.
- Finally, calculate the Percolation Rate (PR) in minutes per inch.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Time for water to drop (T) = 30 minutes
Drop distance (D) = 6 inches
