Home Water Tank & Underground Sump Size Calculator
Determine the exact overhead loft tank and underground storage sump capacity required for your family to ensure zero dry-tap days.
Household Water Demand & Buffer Parameters (IS 1172)
Standard Indian household average: 3–5.
Protects during municipal pipeline maintenance.
Install a 750 Litres 4-Layer UV-Stabilized Overhead Tank
Multi-layer food-grade plastic tanks prevent algae formation and keep water cooler by 10°C during hot Indian summers. A 1 HP monoblock pump fills this tank in ~45 minutes.
Frequently Asked Questions
Q:What is the Indian standard for daily domestic water consumption?
According to the Bureau of Indian Standards code IS 1172, the standard daily domestic water consumption for an Indian household in full plumbing conditions is 135 Litres Per Capita per Day (LPCD): including drinking (3L), cooking (4L), bathing (55L), toilet flushing (30L), washing clothes (20L), washing utensils (10L), and house cleaning (13L).
Q:How much water sump capacity should I construct compared to overhead tank?
Structural and plumbing engineers recommend sizing your underground sump between 1.5× to 2.0× your overhead tank capacity (e.g. 2,000L to 3,000L sump for a 1,000L overhead tank). This ensures you can store sufficient water from irregular municipal tanker supply without overflowing.
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