Start with water demand
Water planning begins with what the project needs to use. Occupants, fixtures, bathing, laundry, cooking, cleaning, outdoor use, livestock, irrigation, and other demands can change the total significantly.
For an early household estimate, the Water Storage Planner can provide a starting point based on people, daily use, and desired storage days. Treat the result as a planning estimate rather than a final system requirement.
Research the water source
The source determines much of the rest of the system. Common possibilities include a public or shared utility connection, private well, rainwater collection, hauled water, or another site-specific source.
Utility or shared service
Research availability, connection location, pressure, fees, service requirements, and any restrictions that apply to the property. A nearby line does not by itself establish that a connection is available or practical.
Well water
Research the site's well conditions, expected yield, water quality, pumping requirements, storage needs, and applicable requirements. A well is a site-specific resource and should not be treated as a guaranteed source simply because groundwater is present.
Rainwater
Rainwater systems depend on catchment area, rainfall patterns, collection losses, storage, treatment, and the intended uses. The Rainwater Collection Planner can estimate potential collection from roof area and rainfall.
Hauled water
Hauled water shifts some of the system planning toward delivery frequency, vehicle access, storage, water quality, and operating cost. Storage needs to be considered together with the reliability and logistics of replenishment.
Plan storage as part of the system
Storage can provide a reserve between supply events, smooth differences between source availability and demand, and support a system that does not produce water continuously. It does not solve an inadequate source.
When researching tanks, consider usable volume rather than only the manufacturer's headline capacity. Tank geometry, operating levels, access, maintenance, temperature, freezing risk, sunlight, installation location, and the needs of connected equipment can all matter.
For rainwater or hauled-water systems, compare the expected refill interval with the amount of storage and the project's demand. A larger tank may provide more reserve, but it also changes cost, footprint, structural considerations, and maintenance.
Use the Water Storage Planner for a separate early-stage storage estimate and the Rainwater Collection Planner when evaluating a rainwater source.
Research treatment and water quality
Water treatment is not one universal process. The appropriate approach depends on the source, contaminants of concern, intended use, and applicable requirements.
Research may include sediment filtration, disinfection, carbon treatment, softening, reverse osmosis, or other approaches, but equipment should not be selected from a generic list without understanding the actual water-quality problem it is intended to address.
Also distinguish between water intended for drinking and water used for other purposes. A project may have different quality requirements for different uses, subject to local rules.
Consider distribution and pressure
Getting water from the source or storage tank to the point of use introduces another set of decisions. Pumps, pressure controls, piping, valves, filters, hot-water equipment, elevation changes, and fixture demand all interact.
Research the desired service level and the characteristics of the equipment before comparing individual components. A pump's headline flow rating, for example, does not describe how it will perform against the actual system conditions.
Also consider power availability. A water system that depends on pumping may become an important electrical load, particularly in a solar, battery, or limited-service project. Connect the water plan back to the Solar & Power research rather than treating the systems as independent.
Check site and local constraints
- Where is the source, and what is known about its reliability and quality?
- Where can tanks and treatment equipment be located?
- What access is needed for delivery, maintenance, replacement, or inspection?
- Are there freezing, heat, sunlight, flood, drainage, or other environmental concerns?
- What electrical capacity is available for pumps and treatment equipment?
- Which plumbing, health, water-quality, well, rainwater, zoning, permitting, or inspection requirements apply?
- Which parts of the system require licensed design, installation, testing, or professional review?
These questions help organize research. They do not establish that a particular source, tank, treatment method, or plumbing arrangement is approved for a specific property.
A practical research workflow
- Estimate the project's expected water demand and identify unusual or seasonal uses.
- Identify realistic water sources and investigate their reliability, quality, and requirements.
- Compare source availability with expected demand and decide whether storage is needed.
- Use the Water Storage Planner and Rainwater Collection Planner for early planning comparisons where appropriate.
- Identify water-quality goals and research treatment based on actual source information.
- Consider pumps, pressure, piping, power requirements, access, and maintenance as part of the complete system.
- Check applicable local requirements and obtain appropriate professional review before installation.