For business SW Kewat Basket

Water and waste One tank, four uses

One 5,000 L tank. Four ways to protect your home.

One seamless 5,000 litre tank that lives quietly under the ground, out of the sun, safe from damage. Store water, hold waste, treat it for reuse, or let bacteria do the work.

Find the right one Will 5,000 L be enough?

An illustrative model built from the printed dimensions: 2450 × 1770 × 1860 mm. Drag to turn. Bed and backfill: From ROTO’s installation guide, as collected in our notes and not all confirmed by ROTO directly. Your engineer confirms the details for your site.

5,000 L

Underground water tank

Drinking water, irrigation and rainwater harvesting.

A seamless 5,000 litre polyethylene tank for drinking water, irrigation and rainwater harvesting, made to be buried. Join up to five for 25,000 litres.

KES 155,350 incl. VAT
The underground water tank
  1. 1Water inRoof, borehole or county line, through a filter
  2. 2Rests in the darkCool, where algae cannot grow
  3. 3A small pumpSends it to the taps or the irrigation
  4. 4Ø60 cm main openingWith cover and a 23 cm extension
  5. 5Seamless ribbed wall8 to 14 mm polyethylene
  6. 6Gravel backfillROTO guide
  7. 7Sand bedROTO guide
  1. 1Locked walk-on lid
  2. 2The yard stays free
  3. 3Water when the county supply stops
  4. 4Pump to the taps
  5. 5Filter on the way in

5,000 L

Septic tank

A ready-made septic holding tank for plots with no sewer line.

A ready-made 5,000 litre septic tank in seamless polyethylene, for homes and buildings with no sewer connection. Supplied as a holding tank that is pumped out, or as a tank that drains to a soak pit.

KES 157,400 incl. VAT
The septic tank
  1. 1Waste inFrom a house with no sewer connection
  2. 2Held in one pieceA ready-made septic holding tank
  3. 3No seamsNothing leaks out, nothing seeps in
  4. 4Ø60 cm main openingWith cover and a 23 cm extension
  5. 5Gravel backfillROTO guide
  6. 6Sand bedROTO guide
  1. 1Ø60 cm cover
  2. 2Out of sightUnder the ground, out of the sun
  3. 3Where there is no sewer line

5,000 L

Treatment plant

Air and bacteria clean household wastewater for outdoor reuse.

A compact domestic wastewater treatment plant inside one 5,000 litre tank. Air and bacteria clean household wastewater for outdoor reuse. Price on request.

Price on request
The treatment plant
  1. 1Wastewater inHousehold wastewater only
  2. 2Air and bacteriaClean the water
  3. 3Compressor above groundRuns day and night on steady power
  4. 4Treated water outFor outdoor reuse, never for drinking
  5. 5Ø60 cm main openingWith cover and a 23 cm extension
  6. 6Gravel backfillROTO guide
  7. 7Sand bedROTO guide
  1. 1Needs steady electricityFor its compressor, above ground
  2. 2Water to reuseGardens, flushing, washing vehicles
  3. 3Ø60 cm cover

5,000 L Range being confirmed

Bio digester

In general terms, a septic tank that works harder.

A bio digester in a 5,000 litre tank: bacteria break waste down more completely than a septic tank, with no electricity. One size: 5,000 litres. Price on request.

Price on request
The bio digester
  1. 1Waste in
  2. 2Bacteria at workIn general: waste broken down further, less sludge
  3. 3Cleaner liquid outIn general, to a soak pit
  4. 4Range being confirmedThe type is still being decided
  5. 5Gravel backfillROTO guide
  6. 6Sand bedROTO guide
  1. 1No electricityIn general, a bio digester needs none
  2. 2Range being confirmed
  3. 3Ø60 cm cover

Guided choice

Not sure which one? Answer four questions.

Four answers give you a starting point. Our team then confirms every site with you.

1 What do you want to solve?
2 Where is it for?
3 For toilet waste: can you reach a public sewer line?
4 For waste or reuse: is there steady electricity on site?

Our suggestion

5,000 L underground water tank

Water for your family when the county supply stops, from the roof, a borehole or the county line.

Often paired with a septic tank or a bio digester.

See it in the cut-away Talk to our team

The sums, in the open

Will 5,000 L be enough?

Rough guides, so you can see the sums before our team sizes your site properly.

System
Water use per person

20 days

of water for 5 people at 50 L each a day, with no other supply. A 100 m² roof fills the tank with about 63 mm of rain.

Rough guide. The bar shows days of water out of a month. Rain: 1 mm on 1 m² of roof gives 1 litre, and we count 80% of it after gutters and splash. Our team confirms every site.

The tank

Made whole, in Naivasha.

Capacity
5,000 litres
Size
2450 × 1770 × 1860 mm
Weight
210 kg
Wall
8 to 14 mm seamless polyethylene
Openings
Ø60 cm main opening with cover and 23 cm extension; Ø40 cm second opening
Material
UV-stabilised, impact-resistant polyethylene
Made in
Naivasha, Kenya, in ROTO moulds
Colours
BlackGreen

Four uses, four prices

Prices include VAT. Delivery is quoted per trip. The treatment plant and the bio digester are priced for your site.

  1. Underground water tank KES 155,350
  2. Septic tank KES 157,400
  3. Treatment plant Price on request
  4. Bio digesterRange being confirmed Price on request

Joining tanks

Need more? Join them.

Tanks connect in series or in parallel. Two give 10,000 litres; up to five give 25,000 litres.

5 × 5,000 L in series = 25,000 L Ground level
  1. 5,000 Lone tank
  2. 10,000 L2 tanks
  3. 15,000 L3 tanks
  4. 20,000 L4 tanks
  5. 25,000 L5 tanks

Installation

Your contractor installs it. Here is the guidance.

Kewat delivers the tank; digging and plumbing are done by your own contractor. We share ROTO’s installation guidance with you.

  1. House Tank, 2450 × 1770 mm ≥ 1.5 m Road or driveway ≥ 2 m

    Step 01

    Choose the place

    At least 1.5 m from buildings and at least 2 m from traffic. A septic tank goes downhill from the house and well away from boreholes and wells; check your county rules.

  2. Sand bed 15 cm The pit, on its sand bed

    Step 02

    Dig and bed

    The tank sits on a 15 cm bed of sand.

  3. Fill with water as you go 30 cm layers Gravel 4 to 16 mm

    Step 03

    Set it and backfill

    Backfill with 4 to 16 mm gravel in 30 cm layers while you fill the tank with water.

  4. ≤ 70 cm 100 cm with extensions Ø60 cm opening with its extension

    Step 04

    Cover it

    At most 70 cm of soil on top (100 cm with extensions). Under a driveway or parking it needs a concrete relief slab; the walk-on lid is for people, not vehicles.

Please read: From ROTO’s installation guide, as collected in our notes and not all confirmed by ROTO directly. Your engineer confirms the details for your site.

Delivery

To your site, or from our Nairobi office.

  • DeliveredWe deliver and quote delivery per trip, case by case. The tank reaches you within 3 days of payment. Delivery does not include installation.
  • CollectedOr collect the tank from our head office in Baba Dogo, Nairobi, 2 days after payment, or from our factory in Naivasha.
  • PaidBy M-Pesa or bank transfer, 100% before delivery. Credit for businesses and government by written agreement.

Questions about the tanks

How long does a 5,000 litre tank last a family?

As a rough guide, five people using 50 litres each a day draw 250 litres, so a full tank lasts about 20 days with no other supply.

Can I join tanks to get more than 5,000 litres?

Yes. They connect in series or in parallel: two give 10,000 L, up to five give 25,000 L.

Do you install the tank?

No. Kewat delivers; your own contractor digs and plumbs. We share ROTO's installation guidance, which your engineer confirms for your site.

Can I put the tank under a driveway?

ROTO's guide says a tank under traffic needs a concrete relief slab; the walk-on lid takes people, not vehicles. Ask our team before you dig.

How many people can one treatment plant serve?

About six per 5,000 L unit, as ROTO rates its plant. Larger sites combine units; our team sizes every site. Price on request.

What is a bio digester?

In general, a tank where chambers of bacteria break waste down more completely than a septic tank, with no electricity. Kewat makes one size, 5,000 litres; price on request.

How do I pay?

By M-Pesa or bank transfer, 100% before delivery. Credit for businesses and government is possible by written agreement. Prices are in KES and include VAT.

What warranty comes with a tank?

Kewat tanks carry a 7-year warranty on the tank itself. It does not cover how the tank is used or the systems fitted inside it.

Made to be passed on

Buy it once. Tell us about your site.

Choose a tank and send it as a quote request, or talk to our team on WhatsApp. We confirm stock, delivery and the final price.

The water tank WhatsApp +254 716 675 257

A quote request

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