John Mac, PE
Water Systems Specialist · Austin, Texas
Licensed Professional Engineer (Texas) with 13+ years of experience in residential and light-commercial water storage systems. Joined WaterTankCalculator.com in 2026 to write and review the practical guides on tank sizing, pressure, roof loading, and water treatment.
“Most of the tank problems I saw in the field came from three places: wrong capacity, ignored pressure, or skipped treatment. These guides exist to stop those mistakes early.”
Quick Facts
- 13+ years in residential water systems
- Texas Professional Engineer (PE) License — issued 2016
- BS Civil Engineering (Hydraulics focus) — 2013
- 180+ residential tank projects
- Joined WaterTankCalculator.com — 2026
Background
I began working on residential water tank installations in 2011 as a site assistant. After two years of field work I completed a BS in Civil Engineering with a focus on hydraulics in 2013. I obtained my Texas Professional Engineer (PE) license in 2016.
From 2016 onward I have worked full-time on home and small commercial water storage systems. My work covers tank sizing, rooftop structural loading, pressure and float-valve issues, overflow and sediment problems, and basic treatment of well water containing iron and manganese. Over the years I have completed more than 180 residential tank projects.
Role on This Site
I write and review the practical guides related to residential water tanks — sizing, pressure, roof loading, overflow, sediment, hardness, and basic chemical treatment.
These guides are based on field and engineering experience and are intended as planning aids only. They are not a substitute for a licensed engineer on an actual project.
Credentials
- Texas Professional Engineer (PE) License — issued 2016
- BS Civil Engineering (Hydraulics) — 2013
- 13+ years residential water systems experience (2011–present)
Outside This Site
I continue independent consulting on residential water storage systems alongside writing for WaterTankCalculator.com.