Cabin Plumbing: Off-Grid Water Systems Off-grid cabin plumbing requires simple, reliable systems that supply safe water, maintain pressure for fixtures, and handle sanitation without municipal hookups. This guide explains how off-grid water systems work for cabins and tiny homes, how to choose a source (well, spring, rainwater catchment, hauling), how to size tanks and pumps, which filtration and disinfection strategies work best, and practical steps for winter protection and budgeting. Readers will get concrete calculations (gallons per day, tank sizing), equipment options, maintenance schedules, and links to codes and deeper how-to checklists. TL;DR: - Design for conservation first: plan 10–50 gpd per person; size tanks for 3–7 days autonomy (e.g., 3 people × 20 gpd × 5 days = 300 gallons). - Pick a source that matches site reliability: wells and springs give continuous supply; rainwater catchment yields ~623 gallons per 1,000 ft² roof per inch of rain. - Invest in a reliable pump an...