+968 91201801 New Four Elements is now in Riyadh, Kingdom of Saudi Arabia Now open in Riyadh, Saudi Arabia Read the news →
SA Now open in Riyadh, Kingdom of Saudi Arabia

Four Elements United LLC.Promoting Water Conservation
to Save Our Future

Scroll
JohkasouWastewater treatment
Air & OzoneSpatial purification
IrrigationK-Rain water control
AquaponicsSimuGro smart farming
How Johkasou works

Inside a Kubota Johkasou.

One packaged tank, four treatment stages. Scroll to open the KZ-II 5Watch the KZ-II 5 open and see what happens to the water in each chamber.

1

Separate and settle.

In the first chamber solids sink to the sludge zone and the anaerobic filter media traps floating matter while bacteria begin breaking down organics.

Water quality
2

Aerate and digest.

In the contact aeration chamber fine bubbles lift the water through carrier media where aerobic bacteria consume the remaining pollutants.

Water quality
3

Let it clear.

In the sedimentation chamber the last fine particles settle and are returned to the first chamber. The water is now near clear.

Water quality
4

Disinfect.

The disinfection cylinder neutralises pathogens before a single drop leaves the tank.

Water quality
Reuse water, waste management, save our earth

Clean water, returned to the community.

Treated water goes back for irrigation and reuse, so each household uses less without draining what the community keeps.

0%
01 Settle
02 Aerate
03 Clarify
04 Disinfect
New branch · September 2026

Now in the Kingdom of Saudi Arabia.

Four Elements has opened its Riyadh branch. The full range is now available to Saudi customers with local consultation, installation, maintenance and inspections: Kubota Johkasou onsite wastewater treatment, air purification and ozone systems, K-Rain irrigation and SimuGro aquaponics.

BLDG #7277, King Fahad Rd, Secondary #3333
Al Olaya District, Postal Code 12212
Riyadh, Kingdom of Saudi Arabia
Al Faisaliah Tower in Riyadh, where the Four Elements branch is
Al Faisaliah Tower, Riyadh
Kubota Johkasou tank Kubota Johkasou
Johkasou

JOHKASOU:Japan’s Advanced Onsite Wastewater Treatment

To meet the water treatment needs in the Middle East, 4ELEMENTS has committed itself to offering optimal water treatment solutions by utilizing all the technologies, and expertise available. 4ELEMENTS now unveils a package incorporating Japan’s advanced water treatment engineering expertise which has been refined through many years of experience in building water treatment plants. Customers, who are dedicated to building environmentally friendly communities and lifestyles for befitting the 21st century, choose Johkasou.

Johkasou Is A Sophisticated Treatment System That Uses Anaerobic, Aerobic, Sedimentation And Disinfectant Processes To Render Blackwater (That Bears Human Excreta) And/Or Greywater (From Kitchens, Showers, And Sinks) Relatively Harmless And Clean. Johkasou System Was Developed Rapidly In Japan During 1960s In Order To Meet The High Demand For Water Purification of Domestic Wastewater.

Johkasou water reuse
Water reuse

JOHKASOUWater Reuse

Reuse Water, Waste Management, Save Our Earth

4ELEMENTS proudly introduces Kubota Johkasou System In Order to Sustainably Deliver Safe Water To People All Over The Middle East With Water Environment Solutions Honed In Japan. Through Johkasou, Which Can Be Installed Efficiently In A Short Period Of Time, Domestic Wastewater Is Treated And Clean Water is Returned To The Community Reuse. This Results, By Using This Reclaimed Water, Each Household Can Reduce Its Water Consumption Sufficiently and Make Effective Use Of The Water Without Reducing The Volume Of Water Retained In The Community.

To Achieve Such Sustainability. 4ELEMENTS Provides Long-Term Support Through Maintenance And Inspections of Your Kubota Johkasou.

About
KubotaKubota Johkasou partner

Developing Businesses to Benefit Society Since our Founding

From our start in 1890 to this day, Kubota has introduced a wide range of products in the areas of food, water, and the environment.

The Sustainable Development Goals (SDGs), adopted at a UN summit in 2015, established 17 goals for a better world by 2030. Kubota’s corporate principles are supporting the prosperous life of humans while protecting the environment of this beautiful Earth. We believe that our vision for the future is in line with the objectives of the SDGs. The Kubota Group will strive to achieve the SDGs alongside the rest of the world, while contributing to solutions for social issues to enable the sustainable development of communities and companies.

Kubota office building Kubota · since 1890
Line-up

Johkasou - Japan’s Packaged Sewage Treatment Plant

Kubota Offers Plant Package Incorporating Its Advanced Water Treatment Engineering Expertise. Treatment Solutions Are Available In Locations And In Sizes You Require. Combination Of Wastewater Treatment Plants Are Introduced To Serve Your Needs.

KZ

KZ

Residential / commercial

HCZ

HCZ

Residential / commercial

MBR

MBR

High Pollutant / Industrial

MBBR

MBBR

Domestic / Commercial

Air purification
Air

AIR -Spatial Purification

To Ensure That Everyone On The Earth Can Breathe Clean Air To The Fullest Without The Need For Any Mask Use, 4ELEMENTS Offers A Variety Of Solutions That Address Dust, Oil, Mold, Bacteria, And Even Odors In The Air With The Latest Environmental Technologies, Such As Ozonation And Bipolar Ionization.

We Offer Not Only Solutions, But Also Odor Sensing Equipment That Provides Objective, Numerical Instruments That Show You How Bad The Air Smells.

As The Air Expert, We Can Consult Your Air Purification Problems of Any Types And Provide The Effective Countermeasures.

Now, You Can Take A Deep Breath.

Ozone & ion cluster

AIR PURIFICATION -Ozonation & Oxygen Ion Cluster

Spatial Sanitations Can Be Performed Electrically By Two Type Of Different Methods Of Generations: Ozone By SimuGro And Negative & Positive Oxygen Ions by Kalmor. These Sterilization Methods Are Approved Internationally And You Can Observe Yourself The Effectiveness Instantly. Product Demos Are Available.

Topzone

Topzone

Ozonation Application Below 5m³

WK-800

WK-800

Virus/Odor Eliminator

Sterilizer 3000

Sterilizer 3000

Odor remediation

Polfa

Polfa

Odor Sensor

K-Rain

IRRIGATION -Water Control, Nozzle Efficiency

K-Rain persists in leading the industry globally with new developments in rotor and nozzle engineering. The intelligent flow technology is the only rotor of its type to significantly reduce water waste by regulating flow and distance proportionately and simultaneously.

Rotor

Rotor

Range: 3m-23m

Nozzle and bubbler

Nozzle/Bubbler

Spray, Rotary

Solenoid valve

Solenoid Valve

1"~ 2"

Controller

Controller

4 ~ 12 Zones

News

NEWS -Let's Aware Of Possibilities With Sustainable Resources

New branch
Kingdom of Saudi ArabiaRiyadh
Company news

Four Elements opens its Kingdom of Saudi Arabia branch in Riyadh

Our new office on King Fahad Road in Al Olaya brings the full range to Saudi customers.

BLDG #7277, King Fahad Rd, Secondary #3333
Al Olaya District, Postal Code 12212
Riyadh, Kingdom of Saudi Arabia
+966 11 490 3800

Sustainable Water Solutions: The Key to a Greener Future

As cities grapple with the challenges of water scarcity and environmental degradation, the adoption of sustainable water solutions becomes increasingly crucial. Among these solutions.Rainwater harvesting involves capturing and storing rainwater.

Maximizing Water Efficiency: The Role of Smart Irrigation Systems

In the face of mounting water scarcity and environmental concerns, the adoption of smart irrigation systems represents a significant step towards achieving water efficiency and sustainability. By integrating cutting-edge technology.

Harnessing Technology for Sustainable Agriculture

One of the most promising applications of AgTech is precision agriculture, which involves the use of sensors, drones, and data analytics to monitor and manage crop production with unprecedented precision. By collecting real-time data.

The Green Revolution 2.0: Sustainable Agriculture

As the global population continues to grow and environmental pressures intensify, the need for sustainable agricultural practices has never been more urgent. In response to these challenges, a new era of agriculture is emerging.

Sustainable Practices for Water Tank Management

Sustainable Practices for Water Tank Management emphasizes eco-friendly strategies to ensure efficient and responsible water storage. This approach incorporates innovative technologies, such as rainwater harvesting and smart monitoring systems, to optimize water usage.

Proactive Measures for Water Tank Safety

Implementing proactive measures for water tank safety involves regular inspections, preventive maintenance, and the use of advanced monitoring systems. Periodic checks ensure the tank's structural integrity, identifying potential issues before they escalate.

Gallery

GALLERY -Your Needs, Our Expertise

HCZ50 arrivals at Sohar port
HCZ50 arrivals at Sohar port
HCZ14 at Public Clinic
HCZ14 at Public Clinic
HCZ50 in Sohar
HCZ50 in Sohar
HCZ14 at School
HCZ14 at School
HCZ50 arrivals at Sohar port
HCZ50 arrivals at Sohar port
KZII7 in Al-Ansab
KZII7 in Al-Ansab
Manholes on ground
Manholes on ground
Contact

CONTACT US -Get in Touch

In the face of mounting water scarcity and environmental concerns, the adoption of smart irrigation systems represents a significant step towards achieving water efficiency and sustainability. By integrating cutting-edge technology.

All branches
Open in Google Maps ↗
Hover a country, click it to zoom in to its branches
Need Help?