Water-Smart Homes

A comprehensive guide to residential water management, collection, storage, and reuse.

About This Book

This book provides a rigorous technical foundation for designing, building, and maintaining residential water management systems. It covers the full spectrum — from understanding how much water a household actually needs, to harvesting rainwater from rooftops, sizing storage tanks, recycling greywater, and integrating multiple sources into a coherent, safe, and legal system.

Each chapter combines engineering principles with practical calculations, so readers can size real systems for real homes. Worked examples, design worksheets, and Python scripts accompany the theory throughout.

Who This Book Is For

Homeowners planning off-grid, hybrid, or water-resilient homes
DIY enthusiasts tackling self-sufficiency and sustainability projects
Architects and building designers integrating water systems into new builds or retrofits
Engineers seeking a practical residential water engineering reference
Sustainability-minded individuals looking to reduce municipal water dependency and environmental footprint

What You’ll Learn

How to assess your household’s water demand fixture by fixture
How roof surface area, material, and local rainfall determine collection potential
How to size a storage tank using the Rippl method and monthly mass balance
How to design pipe networks, select pumps, and calculate friction losses
How to match filtration and treatment to end use (potable vs. non-potable)
How to design a greywater recycling system for toilet flushing or irrigation
How to integrate rainwater, greywater, and municipal mains into one safe system
How to test water quality and maintain the system over its full lifespan
How to navigate regulations and permits across different jurisdictions
How to evaluate cost-benefit and calculate return on investment

Book Structure

The book is organized in four logical layers:

Part I — Understanding (Chapters 1–2): The residential water cycle, source categories, demand analysis by appliance.

Part II — Collection and Storage (Chapters 3–4): Rainwater harvesting potential, tank sizing methods, storage types.

Part III — Infrastructure and Treatment (Chapters 5–7): Pipes, pumps, filtration, greywater recycling systems.

Part IV — System Design (Chapters 8–9): Full system integration with worked archetypes, consolidated sizing worksheets.

Part V — Operation and Compliance (Chapters 10–13): Water quality monitoring, regulatory frameworks, cost-benefit analysis, maintenance and troubleshooting.

Part VI — Advanced Topics and Reference (Chapters 14–15): IoT, solar pumping, atmospheric water generation, and comprehensive reference data tables.

Author Notes

All calculations use SI units (liters, meters, kPa, kg) unless otherwise noted, with conversion factors provided in the appendices. Python calculation scripts are provided in the code/ directory — each script is self-contained and documented. Code snippets embedded in chapters are limited to 10–20 lines to illustrate key formulas; full implementations live in code/.