How to Clean a Water Tank in Kenya (2026): Step-by-Step, How Often, and Keeping Stored Water Safe

Oct 04, 2026

water storage solutions

Even a covered tank collects silt, algae and slime over time, and dirty tanks can make water unsafe to drink. Cleaning one is a simple half-day job. Here is how, and the tanks available on Buy More Mall from Lets Construct.

1000L Reliance Loft Tank – No More Water Shortages! – price in Kenya — 1000L Reliance Loft Tank – No More Water Shortages!
**KSh 12,500**

6000Ltrs Water Storage Tank – price in Kenya — 6000Ltrs Water Storage Tank
**KSh 43,800**

8000Ltrs Water Storage Tank – price in Kenya — 8000Ltrs Water Storage Tank
**KSh 56,000**

10,000Ltrs Water Storage Tank – price in Kenya — 10,000Ltrs Water Storage Tank
**KSh 68,000**

How Often Should a Water Tank Be Cleaned?

Clean it at least once or twice a year, and straight away if the water smells, changes colour, shows insects or algae, or after floods or repairs to the supply. Tanks fed by rainwater or boreholes may need cleaning more often.

What You Need

Gloves, boots and a soft brush or sponge (no wire brushes on plastic).
Buckets, a wet-dry vacuum or scoop for sludge.
Clean water and a hose.
A chlorine product suitable for drinking water disinfection, used as its label directs.

How to Clean a Water Tank: Step by Step

Close the inlet (and isolate the pump) so no new water enters.
Drain the tank through the outlet or drain valve; use the water for washing or the garden.
Remove the sludge at the bottom with a scoop or vacuum.
Scrub the walls and floor with clean water and a soft brush. Avoid soaps that leave residue.
Rinse and drain the dirty water out.
Disinfect: refill partly, add chlorine as the product label directs for disinfecting storage tanks, run it through the taps until you smell chlorine, and leave it to stand for the time stated.
Flush: drain the chlorinated water, refill with clean water and run the taps until the strong chlorine smell has gone.
Check the lid, overflow and vent screens so insects and dirt cannot get back in.

Safety: never climb into a tank alone or work inside one that has had chlorine in it without ventilation; fumes build up in closed spaces. Large or underground tanks are best cleaned by professionals.

Can I Clean a Tank Without Emptying It?

You can vacuum sludge from a full tank, but you cannot scrub and disinfect it properly. Plan cleaning when the tank is low, and keep a second tank or containers for water in the meantime.

Keeping Stored Water Safe to Drink

Keep the lid tight and the tank out of direct sun where possible (light encourages algae).
Treat drinking water: a home purifier or UV sterilizer adds protection. See RO Water Purifier Price and UV Water Sterilizer Price.
Replace old, cracked or brittle tanks.

Water Tank Prices

Tank	Price
1000L Reliance Loft Tank – No More Water Shortages!	KSh 12,500
6000Ltrs Water Storage Tank	KSh 43,800
8000Ltrs Water Storage Tank	KSh 56,000
10,000Ltrs Water Storage Tank	KSh 68,000

Full range and sizing: Water Tank Price in Kenya.

Not sure which one fits? Send us your details on WhatsApp or through the product page and we will help you choose.

Frequently Asked Questions

How do you clean a water tank?

Close the inlet, drain, remove sludge, scrub with a soft brush, rinse, disinfect with chlorine as the label directs, then flush until the smell is gone.