DIY Concrete Ring Cistern (Low-Cost Residential)¶

Pumps & Lifting • Est. CapEx: Low-cost / Locally fabricated

Technical Overview¶

Appropriate-technology underground rainwater harvesting system built from stacked precast concrete rings, waterproofing compounds, and a submersible pump. Designed for household water security with a total build budget under R$ 6,000, using materials available at standard construction supply stores.

Key Specifications & Engineering Parameters¶

Parameter	Specification
Category	Pumps & Lifting
Capital Cost	Low-cost / Locally fabricated
Primary Mechanism	Precast reinforced concrete rings are stacked in an excavated cylindrical pit and sealed internally with waterproofing mortar to prevent exfiltration and groundwater infiltration. Rooftop runoff is gravity-fed through piping into the cistern; a submersible electric pump provides pressurized extraction for household use.
Target Scale	Household / Village Cluster
Standard Lifespan	10 - 20 Years

Engineering Trade-Offs¶

✅ Advantages⚠️ Limitations

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Cross-Reference & Interactive Tools¶

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