Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Plumbing
Drainage Pipe Slope Calculator
Calculates the required slope and total vertical fall of a drainage pipe to achieve self-cleaning sewage flow over a given horizontal distance. Essential for plumbers designing gravity-fed drain systems.
Fill in the required fields to see your result.
Plumbing
Pipe Friction Loss Calculator
Calculates pressure loss (in PSI) due to pipe friction using the Hazen-Williams equation, given flow rate, pipe length, diameter, and material. Ideal for plumbers and engineers sizing water supply lines.
Fill in the required fields to see your result.
Key differences
| Drainage Pipe Slope Calculator | Pipe Friction Loss Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Inputs required | 4 | 4 |
| Result | Required Fall (inches) | Pressure Loss (PSI) |
| What it does | Calculates the required slope and total vertical fall of a drainage pipe to achieve self-cleaning sewage flow over a given horizontal distance. Essential for plumbers designing gravity-fed drain systems. | Calculates pressure loss (in PSI) due to pipe friction using the Hazen-Williams equation, given flow rate, pipe length, diameter, and material. Ideal for plumbers and engineers sizing water supply lines. |