# Sizing US/CA > Flexible gas piping sizing calculator for Gastite and FlashShield systems. (iPhone/iPad app by Gastite Products LLC.) - Source: https://appshunter.io/ios/app/sizing-usca/id1420112805 (this page in markdown: same URL + `.md`) - Developer: [Gastite Products LLC](https://appshunter.io/developer/668653608) - Category: Utilities, Productivity - Price: Free - Rating: 3.20/5 from 13 App Store ratings · 9 written reviews indexed - Age rating: 17+ - Requires: iOS 10.0 · 27 MB - Languages: American English - Released: 2018-08-23 - Data updated: 2026-06-03 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/sizing-usca/id1420112805/reviews.md ## What is Sizing US/CA? Size Gastite® and FlashShield™ flexible gas piping with this convenient and easy-to-use application for the iPhone. This app allows flexible gas pipe installers to determine the appropriate size Gastite pipe recommended for the installation at hand. Based on the project’s gas type, length of tubing run, supply pressure, pressure drop, and flow capacity – the app will calculate the appropriate size Gastite/FlashShield CSST for your application.
 
 Features
: Includes a location selector for US and CA 
 Scroll wheel automatically adjusts depending on values selected Find your certification card to link a digital version to your device
 FAQs View the latest Design and Installation Guide Search for Gastite and FlashShield products Contact Page submits questions and requests directly to Gastite 
The Gastite and FlashShield flexible gas piping systems are designed and warranted to provide sufficient gas volume and pressure for proper appliance performance using the appropriate sizing tables and methods detailed in the Design and Installation Guide and this Mobile Sizing App. 
Accordingly, the design pressure loss on the Gastite and FlashShield piping system under maximum probable flow conditions, from the point of delivery to the inlet connection of the equipment shall be such that the supply pressure at the equipment is greater than the minimum pressure required for proper equipment operation. Minimum Requirements - iOS version 8 ## Key features - Flexible gas pipe sizing - US and CA location selector - Automatic value adjustment - Certification card access - Installation guide viewer - Product search - Direct contact with developer ## Recent user reviews (9 of 9) All indexed reviews: https://appshunter.io/ios/app/sizing-usca/id1420112805/reviews.md ### 1/5 — Mistake in app *2025-10-31, version 2.9* The flow rate for propane is confusing as it states 1 cubic foot of propane is 1000 Btu and that’s not correct. ### 1/5 — Where did the 1/2” on the sizing chart go? *2023-01-09, version 2.8* 1/2” is no longer on the sizing chart. Why? ### 1/5 — No 1/2 size on app *2023-01-05, version 2.8* Brent ### 3/5 — 1/2 size *2023-01-03, version 2.8* Why was this taken away?!!! ### 1/5 — Missing info *2022-12-29, version 2.8* App no longer has 1/2” sizing available, not sure why they removed it ### 2/5 — What happened to the 1/2”. *2022-12-21, version 2.8* No more 1/2 inch sizing guide. ### 1/5 — Glitchy app *2022-04-11, version 2.7* The app is stuck in the horizontal screen configuration. Also all the text in the certification card section is not visible. All i can see is a black certification card, and when i type my info in the search bars i cannot see the text. ### 5/5 — Good app *2020-03-12, version 2.6* Works fine good app ### 1/5 — 👎 *2019-09-23, version 2.6* This app really sucks The old one was way better ## Frequently asked questions about Sizing US/CA ### What is Sizing US/CA used for? Sizing US/CA is a utility app designed to help installers determine the correct size of Gastite® and FlashShield™ flexible gas piping for their installations. It calculates the appropriate pipe size based on project-specific factors like gas type, tubing length, and pressure. ### Does Sizing US/CA have ads? Yes, Sizing US/CA contains advertisements. As a free utility, ads are displayed to support its continued development and availability. ### What information is needed to size gas piping with Sizing US/CA? To use Sizing US/CA, you will need to input the project's gas type, the total length of the tubing run, the supply pressure, and the desired pressure drop or flow capacity. ### Can I find product information within Sizing US/CA? Yes, the app allows you to search for Gastite and FlashShield products. It also provides access to the latest Design and Installation Guide and a contact page for direct inquiries. ### What devices does Sizing US/CA support? Sizing US/CA is available for iPhone and iPod devices. It requires iOS version 8 or later. ### How often is Sizing US/CA updated? The app was last updated on January 29, 2026, indicating a recent update. The latest version is 3.0. ### What is the age rating for Sizing US/CA? Sizing US/CA has an age rating of 17+. This is likely due to the professional nature of the content and its intended audience. ### Where can I get help if I have questions about Sizing US/CA? You can submit questions and requests directly to Gastite through the Contact Page within the Sizing US/CA application. This ensures your inquiries are directed to the appropriate support team. ## Version history (last 5 releases) ### 3.0 — 2026-01-29 Updated age ratings ### 2.9 — 2023-01-12 Minor update - removed 3/8" from popup window and added back 1/2" in US. ### 2.8 — 2022-12-21 3/8" sizing has been remove for Canada locations. ### 2.7 — 2020-09-16 Use https (secure connection) for notification system. ### 2.6 — 2019-07-11 Fix iPhone X Layout Adjustments ## Apps similar to Sizing US/CA | App | Rating | Price | Category | | --- | --- | --- | --- | | [myTechnician](https://appshunter.io/ios/app/mytechnician/id1497041158) | 4.6 (36) | Free | Utilities | | [TracPipe CounterStrike Guide](https://appshunter.io/ios/app/tracpipe-counterstrike-guide/id996885333) | 3.4 (7) | Free | Utilities | | [Bryant® Service Technician](https://appshunter.io/ios/app/bryant-service-technician/id1123183471) | 2.3 (37) | Free | Utilities | | [WARDFLEX Jobsite Assistant](https://appshunter.io/ios/app/wardflex-jobsite-assistant/id848165568) | 5.0 (1) | Free | Utilities | | [Carrier® Service Technician](https://appshunter.io/ios/app/carrier-service-technician/id1123086541) | 4.2 (110) | Free | Utilities | | [Lennox Smart Tech](https://appshunter.io/ios/app/lennox-smart-tech/id6443907644) | 4.5 (59) | Free | Utilities | ## More apps by Gastite Products LLC - [Thermaflex Duct Calculator](https://appshunter.io/ios/app/thermaflex-duct-calculator/id671835022) All apps by Gastite Products LLC: https://appshunter.io/developer/668653608 --- *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 2026-06-03.*