Underground Polyethylene Cistern Installation¶

Rainwater & Storage • Est. CapEx: Low-cost / Locally fabricated

Technical Overview¶

A complete guide for installing prefabricated polyethylene or fiberglass underground water tanks for rainwater harvesting. Suitable for residential, agricultural, and commercial non-potable water storage.

Key Specifications & Engineering Parameters¶

Parameter	Specification
Category	Rainwater & Storage
Capital Cost	Low-cost / Locally fabricated
Primary Mechanism	A high-density polyethylene (HDPE) or fiberglass cistern is buried in an excavated pit. Rainwater is diverted from downspouts into the tank, and an electric submersible or jet pump delivers water to the use point. The tank is sealed to prevent contamination and buried to protect from sunlight and temperature extremes.
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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