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Water Storage Tanks in Kenya: What You Need to Know Before You Buy
Introduction
Water storage is not optional in Kenya — it’s essential. With intermittent municipal supply in many Nairobi estates and widespread reliance on boreholes and rainwater harvesting outside the city, a reliable water storage system is as important as the building itself.
Choosing the right water storage tank for your Kenyan home or commercial property involves more than just picking the biggest tank available. You need to consider capacity, material, installation position, local water quality, and budget. This guide covers everything you need to make the right choice, and where to buy quality tanks from a trusted hardware store in Nairobi.
Why Every Kenyan Building Needs Water Storage
Kenya’s water supply challenges are well documented:
- Nairobi’s water supply from NCWSC (Nairobi City Water and Sewerage Company) is frequently interrupted, with many areas receiving water for only a few hours per day or even a few days per week
- Kiambu, Ruaka, and satellite towns rely on a mix of municipal supply, boreholes, and water trucking
- Water trucking prices spike dramatically during dry seasons — having storage reduces dependence on trucked water
- Boreholes often pump water at a fixed rate, requiring a tank to buffer demand peaks
A well-designed water storage system gives you water security regardless of supply interruptions.
Types of Water Storage Tanks
1. HDPE (Plastic) Above-Ground Tanks
High-density polyethylene tanks are the most popular water storage solution in Kenya. They’re manufactured by companies like Roto Tanks, JoJo Tanks, and Polytank.
Available capacities: – 200 litres (small household/satellite tank) – 500 litres – 1,000 litres – 2,000 litres – 3,000 litres – 5,000 litres – 10,000 litres
Advantages: – Lightweight and easy to install – UV-stabilized (won’t degrade in direct sunlight) – Food-grade material — safe for drinking water – No corrosion or rusting – Long lifespan (10-20 years+) – Easy to clean via inspection hatch
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Best for: Overhead tanks on rooftops, water towers, and general household use
Installation tip: Install on a strong platform — a full 5,000L tank weighs 5 tonnes. The platform must be engineered for the load.
2. HDPE Underground Tanks
Specifically designed for in-ground installation, underground tanks are the discreet, space-efficient solution:
- Typically round or cylindrical profile for soil pressure resistance
- Heavy walls designed for burial depth up to 1.5m
- Available from 1,000L to 10,000L+
- Can be linked in series for higher capacity
Best for: – Properties with limited surface space – High-capacity residential and commercial storage – Rainwater harvesting systems
3. Galvanized Steel Tanks
Traditional steel tanks are still widely used in Kenya: – Strong and durable (if properly maintained) – Can be fabricated on site to any size and shape – Available pre-fabricated in standard sizes – Must be cleaned and inspected periodically for corrosion
Best for: Older installations, commercial applications, areas where plastic tanks are not available
4. Ferrocement Tanks
Ferrocement is a cost-effective, locally built tank option: – Constructed from wire mesh and cement plaster – Very long lifespan if properly built – Can be built to any size – Ideal for large-capacity rural storage
Best for: Rural water supply, large-volume institutional storage, budget-constrained projects
5. Concrete Tanks
Reinforced concrete tanks can be built underground or partially underground: – Very large capacities possible (50,000L+) – Long lifespan – Requires waterproofing treatment inside – Higher initial cost but very long service life
Best for: Commercial and institutional water storage, large residential estates
What Size Tank Do You Need?
Sizing your tank correctly is crucial. Here are general guidelines for residential use:
| Property Size | Recommended Storage | |—|—| | 1-2 bedroom apartment | 1,000–2,000 litres | | 3 bedroom house | 2,000–5,000 litres | | 4-5 bedroom house | 5,000–10,000 litres | | Apartment block (10 units) | 20,000–30,000 litres |
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Key sizing factors: – Number of occupants (plan for 30-50 litres per person per day for basic use) – Frequency of supply interruptions (more frequent interruptions = more storage needed) – Whether you have a borehole, rainwater harvesting, or municipal supply – Whether you have a swimming pool or irrigation system
Overhead vs. Underground Tanks
The choice between overhead and underground tanks depends on your water distribution system:
Overhead Tanks
– Water flows by gravity to all outlets below the tank
– No pump required for distribution (energy-saving)
– Pressure depends on height above lowest outlet (every 10m of height = 1 bar pressure)
– Standard homes need a minimum of 3-5m height above the highest outlet
Underground Tanks
– Require a pump to distribute water to the building
– Can store much larger volumes than practical overhead
– Water quality is better maintained (no UV exposure, cooler temperatures)
– Good for borehole water collection before distribution
Most Kenyan homes use a combination: an underground collection tank fed by borehole or municipal supply, pumped to an overhead tank for gravity-fed distribution.
Water Tank Installation Guide
For Overhead Tanks
1. Design and construct the support platform (consult a structural engineer for large tanks)
2. Ensure the tank inlet is properly connected to the supply pipe
3. Install a float valve to shut off supply when full
4. Connect the outlet at the bottom with a ball valve for isolation
5. Install an overflow pipe to discharge safely away from the building
For Underground Tanks
1. Excavate to the required depth and size
2. Provide a level, compacted base
3. Lower the tank carefully and backfill with sand around the sides
4. Connect inlet and outlet pipes
5. Ensure the manhole cover is accessible for inspection and cleaning
Water Tank Maintenance
Maintaining your water tank extends its life and keeps your water safe:
- Clean annually: Empty the tank, scrub with clean water and mild disinfectant, rinse thoroughly before refilling
- Check float valves: Inspect and replace ball float valves every 3-5 years
- Inspect for cracks or leaks: Especially for ferrocement and concrete tanks
- Check the inlet screen: Keep the inlet filter clear of debris
- Treat borehole water: If using borehole water, consider UV treatment or chlorination
Where to Buy Water Storage Tanks in Nairobi
Pioneer Hardware in Ruaka, Nairobi, stocks a range of water storage tanks from trusted manufacturers. Our range includes:
- HDPE above-ground tanks (200L to 10,000L)
- Underground tanks
- Galvanized steel tanks
- Tank fittings: float valves, outlet valves, inlet fittings, overflow connections
Our team can advise on the right tank size for your project and help you plan the full water supply system.
Conclusion
Water storage is a critical investment for any Kenyan property. By choosing the right tank size, type, and installation position — and buying quality tanks from a trusted hardware store in Nairobi like Pioneer Hardware — you ensure your property has a reliable water supply regardless of external supply conditions.
Visit Pioneer Hardware in Ruaka, Nairobi, for water tanks and all your plumbing supply needs.
*Pioneer Hardware — Your Water Storage and Plumbing Materials Specialist in Nairobi*
Partner with the most reliable hardware shop in Kenya. Contact Pioneer Hardware today at 0723364999 for a free quote on your materials.
Tags: hardware store kenya, hardware in nairobi, building materials, hardware store nairobi, hardware materials
