Sewer pipe calculator
Sewer Hydraulic calculations
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Sewer Pipe Calculations is a professional tool for engineers and technicians designing gravity sewer and drainage systems. Perform quick, accurate hydraulic calculations based on the Manning equation for partially full circular pipes.
Calculations included:
• Velocity & Depth — Find flow velocity and water depth given flow rate, slope, and diameter
• Diameter from Flow — Size the minimum pipe diameter for a design flow and slope
• Slope Range — Determine acceptable slope limits based on velocity and tractive force constraints
• Minimum Slope & Diameter — Simplified sewer design when only flow is known (ideal for condominial/small-bore systems)
• Flow & Velocity from Depth — Analyze existing pipes given geometry and water level
Key Features:
• Supports SI (metric) and US customary units
• Customizable pipe diameter catalog — add or remove standard sizes
• Built-in Theory section explaining all formulas and assumptions
• Bilingual interface: English and Spanish
• Clean, intuitive interface designed for field use
# Technical Foundation:
All calculations are based on the Manning equation for open channel flow, with proper treatment of partially full pipe geometry (central angle, wetted area, hydraulic radius). The app includes tractive force verification for self-cleansing design.
Perfect for civil engineers, sanitary engineers, and technicians working on sewer networks, drainage projects, and simplified sewerage systems.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Calculating with the keyboard open now closes it, so the result is visible
straight away. One tap does both — before, the keyboard stayed over the number
you had just calculated
• Fixed: saving a project needed two taps when the keyboard was open. One tap
is enough now — the same applies to renaming a project and saving a segment
• Your project is now named right where it lives, at the top of the Collector
Design screen, with Save, Export and New next to it
• My Projects: a visible ⋯ button on every project to rename, duplicate or
delete it
The developer, Transparent Blue Water LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Transparent Blue Water LLC
- Size
- 32 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Structures Pack $3.99
- SewerCalc Pro $2.99
- Copyright
- © 2026 Transparent Blue Water