# Sewer pipe calculator — Sewer Hydraulic calculations > Sewer Hydraulic calculations (iPhone/iPad app by Transparent Blue Water LLC.) - Source: https://appshunter.io/ios/app/sewer-pipe-calculator/id6758410223 (this page in markdown: same URL + `.md`) - Developer: [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) - Category: Utilities, Productivity - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 15.1 · 31 MB - Languages: American English - Released: 2026-01-30 - Data updated: 2026-08-07 - User reviews in markdown: https://appshunter.io/ios/app/sewer-pipe-calculator/id6758410223/reviews.md ## What is Sewer pipe calculator? 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. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | SewerCalc Pro | $2.99 | one-time | | Structures Pack | $3.99 | one-time | ## Version history (last 5 releases) ### 1.0.9 — 2026-08-03 • 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 ### 1.0.7 — 2026-08-02 • New: export your collector line as an EPA SWMM input file (.inp) — open the design you just made in HydroSewer, EPA SWMM or any SWMM tool and analyse it without retyping a single number • Export is now one button: PDF design table or SWMM input file • Pipe crowns are now matched at manholes where the diameter increases, so a wider pipe never leaves its crown above the one discharging into it ### 1.0.6 — 2026-08-01 • Save your collector lines as named projects — open, rename and duplicate them anytime • Manhole depths and invert elevations, plus a clearer longitudinal profile ### 1.0.5 — 2026-07-25 Added an App Preview video to highlight key features, along with minor stability improvements ### 1.0.4 — 2026-07-13 • New (free): Tractive force self-cleansing check in the flow calculators — confirm your pipe won't silt up, not just its velocity • New Structures Pack module: Orifices & Gates (free for existing owners) • New (In-App Purchase) Force Main Pack: TDH, economic diameter and water hammer for pumped mains • New (In-App Purchase) Collector Designer: design a full gravity sewer line segment by segment — Excel-style worksheet, longitudinal profile and PDF • Improved accuracy of the partially-full flow calculations ## Apps similar to Sewer pipe calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Pipe Craftsmen](https://appshunter.io/ios/app/pipe-craftsmen/id6784750990) | — | Free | Utilities | | [Wastewater Operator Calculator](https://appshunter.io/ios/app/wastewater-operator-calculator/id6761349297) | 5.0 (1) | Free | Utilities | | [Pump Go](https://appshunter.io/ios/app/pump-go/id6745105179) | — | Free | Utilities | | [Grade Calculator Plumbin Daily](https://appshunter.io/ios/app/grade-calculator-plumbin-daily/id6745386325) | — | Free | Utilities | | [Concrete Calculator - SolidMix](https://appshunter.io/ios/app/concrete-calculator-solidmix/id6751228843) | — | Free | Utilities | | [SIC4340 Generic](https://appshunter.io/ios/app/sic4340-generic/id6478389759) | — | Free | Utilities | ## More apps by Transparent Blue Water LLC - [HydroCalc Plus](https://appshunter.io/ios/app/hydrocalc-plus/id578807688) - [HydroCalc Basic](https://appshunter.io/ios/app/hydrocalc-basic/id6752577110) - [HydroSewer - Drainage Network](https://appshunter.io/ios/app/hydrosewer-drainage-network/id6754671899) - [FlowAnalyzer - Water Network](https://appshunter.io/ios/app/flowanalyzer-water-network/id6754671981) - [Pipe Hydraulic Network Viewer](https://appshunter.io/ios/app/pipe-hydraulic-network-viewer/id6754879365) - [NPSH Calculator](https://appshunter.io/ios/app/npsh-calculator/id6756281499) All apps by Transparent Blue Water LLC: https://appshunter.io/developer/1847968351 ## Related topics [sewer pipe calculator](https://appshunter.io/ios/topics/sewer-pipe-calculator) · [sewer](https://appshunter.io/ios/topics/sewer) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-07.*