Drainage Pipe Slope Calculator vs Plumbing Fixture Unit Calculator
Two calculators for the same neighbourhood of questions. Here is what each measures, what you feed in, and where you'd reach for one over the other.
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.
- Answers
- Required Fall (inches)
- Inputs
- Pipe Diameter, Horizontal Distance, Expected Flow Rate
Plumbing Fixture Unit Calculator
Add up the drainage fixture units (DFU) for every toilet, sink, shower, bathtub, and appliance in a building to find the correct supply and drain pipe sizes per plumbing code. Essential for new construction, additions, or remodels.
- Answers
- Total Fixture Units (FU)
- Inputs
- Number of Toilets, Number of Sinks, Number of Showers, Number of Bathtubs, Other Appliances
At a glance
| Drainage Pipe Slope Calculator | Plumbing Fixture Unit Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Answers | Required Fall | Total Fixture Units |
| Inputs | 3 | 5 |
| Result unit | inches | FU |
When to use each
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.
Add up the drainage fixture units (DFU) for every toilet, sink, shower, bathtub, and appliance in a building to find the correct supply and drain pipe sizes per plumbing code. Essential for new construction, additions, or remodels.