Plumber struggles to calculate gas pipe sizing for a new appliance, specifically whether 3/4" CSST and poly pipe will suffice for a 125-foot, 30k BTU run, due to confusion with sizing chart math.

Sizing charts are complex and error-prone for non-engineers; no simple tool exists to input distance, BTU, pressure, and pipe type to get a definitive answer.

Severity

3Medium

Willingness to Pay

implied

Added

Jun 7, 2026

Workarounds Described

studies sizing chart manually
draws crude diagram of house setup

Implied Software Gaps

Mobile app that calculates gas pipe sizing based on inputs (BTU, distance, pipe material, pressure) without referencing charts

App Concept

PipeSizer Pro

A mobile app that calculates gas pipe sizing instantly. Plumbers input distance, BTU load, pipe material, and pressure; the app outputs required diameter and maximum run length with clear yes/no guidance.

Key Features

Input total BTU and distance to get recommended pipe diameter
Support for CSST, black iron, poly, and other common materials
Display maximum allowable run length for given pipe size and pressure
Include a diagram builder for complex layouts

Target Users: Plumbers and HVAC technicians in small-to-medium businesses sizing gas lines for residential or light commercial projects

Revenue Model: $9.99/month or $49.99/year subscription; free version with ads and limited calculations

Existing Solutions Mentioned

sizing chartcrude drawing

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