# Pro-Flex Utility Belt — Tool for Sizing CSST & PE Pipe

> CSST sizing calculator for gas system installations. (iPhone/iPad app by Pro-Flex, LLC.)

- Source: https://appshunter.io/ios/app/pro-flex-utility-belt/id1576747215 (this page in markdown: same URL + `.md`)
- Developer: [Pro-Flex, LLC](https://appshunter.io/developer/1576747217)
- Category: Utilities, Productivity
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 12.0 · 20 MB
- Languages: English
- Released: 2022-02-10
- Data updated: 2026-06-13
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/pro-flex-utility-belt/id1576747215/reviews.md

## What is Pro?

This app helps anyone to easily calculate Pro-Flex products and determine the appropriate size CSST recommended for their installation. Select the gas type, length of tubing, supply pressure, pressure drop, and flow capacity – the app will calculate the appropriate size FlakJacket CSST for your application.

Features:
Fast calculator to help design your gas system


Access to design, installation and technical resources

## Key features

- CSST sizing calculator
- Gas system design
- Access to technical resources
- Fast calculations


## Frequently asked questions about Pro

### What is Pro-Flex Utility Belt used for?

Pro-Flex Utility Belt is a tool designed to help users easily calculate Pro-Flex products and determine the appropriate size of CSST (Corrugated Stainless Steel Tubing) recommended for their specific gas system installations.

### How does Pro-Flex Utility Belt calculate CSST size?

The app calculates CSST size by taking into account the gas type, length of tubing, supply pressure, pressure drop, and flow capacity that you input. It then recommends the appropriate size FlakJacket CSST for your application.

### Is Pro-Flex Utility Belt free to use?

Yes, Pro-Flex Utility Belt is available for free. It does not have any associated costs for download or use.

### What devices support Pro-Flex Utility Belt?

Pro-Flex Utility Belt is supported on iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users.

### When was Pro-Flex Utility Belt last updated?

Pro-Flex Utility Belt was last updated on February 10, 2022, with version 1.0. The app was initially released on the same date.

### What is the age rating for Pro-Flex Utility Belt?

Pro-Flex Utility Belt has an age rating of 4+, indicating it is suitable for users of all ages.

### Does Pro-Flex Utility Belt offer offline functionality?

The provided data does not specify whether Pro-Flex Utility Belt offers offline functionality. However, its nature as a calculator suggests it may operate without a constant internet connection for core calculations.

### What kind of technical resources are available in Pro-Flex Utility Belt?

Pro-Flex Utility Belt provides access to design, installation, and technical resources related to Pro-Flex products and CSST sizing, aiding users in their gas system projects.

## Version history (last 1 release)

### 1.0 — 2022-02-10

No release notes.

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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 2026-06-13.*