# Sanitary Dft. Supt. — Plumbing Drafting Support

> Plumbing Drafting Support (iPhone/iPad app by Hiroaki Oosawa.)

- Source: https://appshunter.io/ios/app/sanitary-dft-supt/id6799862269 (this page in markdown: same URL + `.md`)
- Developer: [Hiroaki Oosawa](https://appshunter.io/developer/6797133579)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.5 · 77 MB
- Languages: American English, Japanese
- Released: 2026-09-21
- Data updated: 2026-09-22
- User reviews in markdown: https://appshunter.io/ios/app/sanitary-dft-supt/id6799862269/reviews.md

## What is Sanitary Dft. Supt.?

[Overview]
Based on Japanese Design Standards

Sanitary Drafting Supporter is a professional calculation app for sanitary shop drawings and plumbing design.

It brings together the calculations most frequently required for sanitary and plumbing projects, including water supply and drainage pipe sizing, piping engineering calculations, and simplified seismic calculations for pipe supports.

Designed for engineers, designers, and construction professionals to improve efficiency in sanitary shop drawing preparation and plumbing design.

[Key Features]

* Water Supply & Drainage Pipe Sizing (Fixture Unit Method)

* Automatically calculates pipe sizes using the Fixture Unit Method.
* Calculates fixture units and recommends pipe sizes from the selected plumbing fixtures.
* Manage and edit multiple piping systems.
* Combine or modify piping systems easily.
* Verify results with a flow diagram.

* Piping Engineering Calculations
Perform essential piping calculations required for plumbing design and shop drawings.

* Pipe weight calculation
* Flow velocity calculation
* Pressure loss calculation
* Thermal expansion calculation

Supports design studies and engineering documentation.

* Simplified Seismic Calculations for Pipe Supports

* Simplified seismic calculations for L-shaped supports
* Simplified seismic calculations for portal frame supports
* Anchor bolt strength check
* Anchor bolt pull-out verification

Helps verify the safety of pipe support systems during the design stage.

[Recommended For]

* Plumbing designers
* Sanitary shop drawing engineers
* Building services engineers
* Construction managers
* Mechanical (MEP) engineers
* Plumbing contractors
* Professionals involved in sanitary and plumbing projects

[Evaluation Period]
All features are available for 30 days after initial installation. An auto-renewable subscription is required to continue using the features after the 30-day period.

Terms of Use (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Privacy Policy:
https://ratel-okottel.com/privacy/


Evaluate the app in your actual design and shop drawing workflow before purchasing.

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Monthly | $2.99 | per month |
| Premium Yearly | $29.99 | per year |



## Version history (last 1 release)

### 1.0.0 — 2026-09-21

No release notes.

## More apps by Hiroaki Oosawa

- [Humidity Calc](https://appshunter.io/ios/app/humidity-calc/id6797133577)
- [Drainage Tank Water Level Calc](https://appshunter.io/ios/app/drainage-tank-water-level-calc/id6798235033)

All apps by Hiroaki Oosawa: https://appshunter.io/developer/6797133579

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*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 2026-09-22.*