Gas Sizing Explained! (How To Read IPC, IRC, & IFGC Charts)

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Welcome to An Introduction to Gas Sizing! Today on Serving Up Plumbing with David Butler, we're doing a full overview on Gas Sizing- Gas Sizing Explained! Now here at Serving Up Plumbing, I primarily cover residential service plumbing, so we will be using the International Residential Code which is a part of the International Plumbing Code. We are also referencing the International Fuel Gas Code which is ALSO a part of the IPC and IRC. This is the first video in a long series of Gas Pipe Sizing: How To Do It, How To Read Gas Sizing Charts, and all the different Charts there are including charts for CSST, Schedule 40 Metallic Pipe, Polyethylene Plastic Pipe, and more! We will also eventually be diving deeper into the differences in reading the Natural Gas Charts vs Propane Charts. Check below for the full index of the video and subscribe for more to come on the subject of Gas Sizing!


0:00 Intro
0:38 What We Use Gas Sizing For Today
1:20 Different Pipes & Systems w/ Gas Sizing
1:45 The International Plumbing Code in the DFW Area
2:00 The International Residential Code and Uniform Plumbing Code
2:29 Chapter 24 of the IRC- FUEL GAS
2:48 Different Pressures in Gas Sizing (Residential)
5:20 What type of pipe, gas flow, and pressure are you working with?
5:40 Hybrid 2 lb. System
6:50 Reading the Different Types of Charts for Gas Sizing in the IRC/IFGC
8:00 Undiluted Propane (LP) vs Natural Gas Chart Reading
8:43 Mathematically Solving Gas Sizing and Equations
9:30 Is the Gas Sized Properly?
9:57 How To Use The Gas Sizing Charts
10:57 BTU (British Thermal Units) to CFH (Cubic Ft Per Hour) Conversions
11:30 Each Individual Pipe & Chart Coming Soon!
11:50 Outro


David Butler is a licensed master plumber, who has been serving the Dallas Forth Worth area for over 40 years. Subscribe for more plumbing tips and tricks!

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DISCLAIMER: The information in this video is both opinion of responsible master plumber, David Butler and reference to fact of the International Plumbing Code/ International Fuel Gas Code (codes 2018-2024). David Butler, Serving Up Plumbing and any and all related parties shall not be held liable or responsible for repairs, installations, or work performed by any persons referring to or copying or attempting to copy the activities in these videos or information relating to this channel. Serving Up Plumbing 2025.


Produced by Green Ear Productions and David Butler. 2025.

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