Inspect a catchment home
Review the roof, tank, pump, treatment equipment, records, and backup plan.
Open resource →Resource center · reviewed August 7, 2026
Catchment Water Planning
Plan catchment storage, maintenance, treatment, testing, replacement reserves, and buyer due diligence using Hawaiʻi-specific guidance.
Comparable facts
Catchment planning path comparison
Plan the entire path from roof to tap. Tank capacity is only one part of reliability; collection surfaces, storage, pumps, treatment, testing, maintenance, power, and emergency water all matter.
Size storageSize storage using household demand, roof yield, rainfall uncertainty, delivery access, and a dry-day buffer.
Inspect and documentInspect and document the roof, gutters, inlet controls, tank, pump, pressure equipment, filters, disinfection, plumbing, and backup-water path.
Budget upkeepEstimate annual maintenance and replacement reserves with actual product and service costs.
Write the planSet a written maintenance and testing schedule using current official guidance and qualified advice.
Keep recordsKeep records so buyers, residents, and service providers know what was done.
Plan the entire path from roof to tap. Tank capacity is only one part of reliability; collection surfaces, storage, pumps, treatment, testing, maintenance, power, and emergency water all matter.
Estimate annual maintenance
Budget filters, UV, testing, cleaning, pump reserves, and emergency water.
Open resource →Build a testing and maintenance plan
Track the water path, service dates, records, and questions for qualified guidance.
Open resource →Decision path
Use the cluster in order
- Size storage using household demand, roof yield, rainfall uncertainty, delivery access, and a dry-day buffer.
- Inspect and document the roof, gutters, inlet controls, tank, pump, pressure equipment, filters, disinfection, plumbing, and backup-water path.
- Estimate annual maintenance and replacement reserves with actual product and service costs.
- Set a written maintenance and testing schedule using current official guidance and qualified advice.
- Keep records so buyers, residents, and service providers know what was done.
Primary sources