Quick Answer
To set up an off-grid water system in a tiny house, start by determining the household's water needs, then choose between rainwater harvesting and well water, and finally, select a suitable storage tank and pump system.
Choosing Water Source
For a tiny house on wheels, consider using rainwater harvesting as the primary water source. This method collects and stores rainwater from the home’s roof, reducing the need for municipal or well water. Calculate the roof’s surface area and multiply it by the average annual rainfall in your area to determine the potential water collection volume. For example, a 200-square-foot roof in a region receiving 40 inches of rainfall per year can collect approximately 3,200 gallons of water annually.
Selecting Storage Tank and Pump System
Choose a storage tank that meets or exceeds the household’s water needs, considering factors such as storage capacity, material, and durability. A 50-gallon tank is a good starting point for a tiny house, but you may need a larger tank depending on the number of occupants and water usage. Select a pump system that matches the storage tank’s size and the household’s water needs. Submersible pumps are suitable for most off-grid applications, offering a compact and energy-efficient solution.
System Design and Installation
Design the off-grid water system to ensure a reliable supply of clean water. Consider using a first flush device to divert debris and contaminants from the roof’s downspouts, protecting the storage tank and pump system from contamination. Install the system according to local building codes and regulations, and consult with a professional if you’re unsure about any aspect of the installation process.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.