3 people For cottages and smaller homes
PRIMELOS-3
A compact domestic sewage treatment plant for smaller homes with seasonal or year-round occupancy.
0.6 m³/day 240 L surge capacity
$2,007
gravity discharge
Advanced Wastewater Treatment Solutions
Engineered
for your comfort.
Built to last.
We design, build, and launch high-performance wastewater treatment systems for residential and commercial properties.
8+
years of experience
1 000+
systems installed
99%
customer satisfaction
ABOUT US
Modern domestic sewage treatment for private homes
Our team provides a complete turnkey engineering solution — from planning and installation to ongoing service. We combine advanced technology, proven materials, and years of practical experience.
A next-generation domestic sewage treatment plant for private homes and commercial properties. We manufacture systems designed to operate reliably, discreetly, and with a long service life.
Contact us8+
Years of experience
1000+
Systems installed
20
Year body warranty
100%
Odor-free operation
QUICK SELECTION
Most homeowners choose systems for 3, 4, or 5 people
Not sure which model to choose? Start with one of our most popular domestic sewage treatment plants — our engineer will review your site conditions and confirm the right system before you order.
Most popular choice
4 people Ideal for a family home
PRIMELOS-4
A versatile model for families of 3–4 people and standard residential properties.
0.8 m³/day 340 L surge capacity
$2,140
gravity discharge
5 people Extra capacity for higher demand
PRIMELOS-5
A smart choice for homes with multiple bathrooms, a bathtub, or frequent guests.
1.0 m³/day 440 L surge capacity
$2,467
gravity discharge
Installation, delivery, and earthworks are not included.
ADVANTAGES
Built for stable, long-term performance
Efficiency
Efficiency is achieved through biological treatment. Aerobic bacteria inside the system continuously break down organic contaminants using oxygen.
We are the manufacturer
Manufacturing, installation, and service are handled within one area of responsibility. This reduces risks and simplifies warranty support.
Installation
Installation takes minimal time on site and is carried out according to a pre-approved installation plan.
Expert selection
We do not offer one-size-fits-all solutions. The system is selected based on soil conditions, water level, site layout, and occupancy.
Reliability
The body, equipment, and installation layout are designed for stable operation in residential conditions.
Environmental safety
The system is environmentally safe: its durable polypropylene body is resistant to corrosion, and treated water can be discharged according to the approved design.
COST CALCULATOR
Calculate the right PRIMELOS system for your home
Answer a few questions — the calculator will recommend a suitable domestic sewage treatment plant.
SYSTEM CATALOG
PRIMELOS Domestic Sewage Treatment Plants
Choose a model based on the number of residents. Prices are shown for the treatment system only and do not include installation, delivery, or earthworks.
2 people PRIMELOS-2
For a small home, cottage, or guest property with low wastewater demand.
0.4 m³/day 150 L surge
Price
$1,740
3 people PRIMELOS-3
A compact system for a smaller private home with year-round or seasonal occupancy.
0.6 m³/day 240 L surge
Price
$2,007
4 people Popular PRIMELOS-4
An optimal model for families of 3–4 people and standard residential properties.
0.8 m³/day 340 L surge
Price
$2,140
5 people PRIMELOS-5
For homes with higher daily demand, multiple bathrooms, or a bathtub.
1.0 m³/day 440 L surge
Price
$2,467
6 people PRIMELOS-6
For families of up to 6 people, year-round occupancy, and stable daily use.
1.3 m³/day 540 L surge
Price
$2,780
8 people PRIMELOS-8
For larger homes, frequent guests, and multiple water-use points.
1.6 m³/day 710 L surge
Price
$3,087
10 people PRIMELOS-10
For spacious homes, cottages, and properties with consistently high wastewater demand.
2.0 m³/day 860 L surge
Price
$3,393
12 people PRIMELOS-12
For large homes, guest properties, and commercial facilities.
2.4 m³/day 980 L surge
Price
$3,993
15 people PRIMELOS-15
For properties with intensive operation and a large number of users.
3.0 m³/day 1,100 L surge
Price
$4,633
CLIENT REVIEWS
What homeowners say about PRIMELOS
For more than 8 years, we have been installing domestic sewage treatment plants for private homes, cottages, and commercial properties.
★★★★★
“We installed a PRIMELOS-3 system for our country home. The installation was completed quickly, and the team explained the maintenance clearly. The system runs quietly, there is no odor, and the site was left clean after the work.”
Tatiana
★★★★★
“We were choosing between several models, and the manager helped us select PRIMELOS-4 for our family. We did not have to figure out all the technical details ourselves — everything was calculated and explained in simple terms.”
Yuri
★★★★★
“We chose PRIMELOS-5 because our home has two bathrooms and we often have guests. The system works reliably and has not caused any issues. I liked that the company manufactures, installs, and services the equipment itself.”
Dmitry Borisov
INSTALLATION & SERVICE
PRIMELOS system installation and maintenance
We not only help you choose the right system, but also assist with installation, start-up, and ongoing maintenance.
System installation
A PRIMELOS system can be installed independently, but reliable operation depends on following the correct installation procedure.
- an excavation pit is prepared
- the system is placed on a sand bedding layer and positioned strictly vertically
- the system is connected to the sewer pipes and electrical supply
- after connection, the system is backfilled with sand up to the neck and then covered with soil
Technical maintenance
The system should be serviced once every two years. Maintenance helps keep the system operating reliably and extends the service life of the equipment.
- removal of sludge sediment using a drainage pump for dirty water
- rinsing the pump and biofilter with clean water
- checking the operation of the main system components
- recommendations for further operation
FAQ
Frequently asked questions about septic systems and domestic sewage treatment plants
We have answered the most common questions homeowners ask before choosing a treatment system for a private home.
How do I know which system is right for my home?
The main factors are the number of permanent residents, the number of bathrooms, and whether the home has a bathtub, washing machine, or dishwasher. Soil type, groundwater level, and occupancy pattern also matter. If you do not want to sort through the technical details yourself, leave a request — our specialist will help select the right model for your property.
What is the difference between a septic tank and a biological treatment system?
A conventional septic tank mainly settles wastewater, while a biological treatment system additionally treats it using aerobic bacteria and air supply. This type of system is more efficient and is well suited for year-round use in a private home.
Will there be any odor on the property?
With proper system selection, installation, and operation, there should be no unpleasant odor. Odor issues are usually caused by installation mistakes, improper ventilation, system overload, or lack of maintenance.
Can the system be used in winter?
Yes. The system is designed for year-round operation. With regular occupancy, it works reliably because warm household wastewater enters the system continuously. For seasonal use, the system should be properly prepared for downtime.
How often does the system need maintenance?
On average, maintenance is performed approximately once every 1–2 years. The frequency depends on the model, number of residents, system load, and operating conditions. Maintenance typically includes removing excess sludge, rinsing system components, and checking the equipment.
Can I install the system myself?
Self-installation is possible, but the installation process must be followed carefully: preparing the excavation pit, creating a sand bedding layer, positioning the body vertically, and correctly connecting the pipes and electrical supply. Installation errors may affect system performance and service life.
What is included in the system price?
The listed price usually refers to the treatment system itself. Delivery, installation, earthworks, connection, and the water discharge layout are calculated separately after assessing the site and installation conditions.
What should not be discharged into the system?
Construction mixtures, solvents, aggressive chemicals, large amounts of chlorine-based cleaners, oils, rags, wet wipes, and bulky waste should not be discharged into the system. These substances can disrupt bacterial activity or clog the system.
What if the property has a high groundwater level?
With a high groundwater level, the system model, discharge method, and installation layout must be selected especially carefully. In these cases, forced discharge and additional anchoring or stabilization solutions are often considered.
Which system is the most popular?
For private homes, the most commonly selected systems are models for 3, 4, and 5 people. They suit most family homes and cover typical use cases: a small cottage, a family of 3–4 people, or a home that needs additional capacity.
Didn’t find the answer to your question?
Leave a request — our specialist will help you choose the right system and explain which installation layout is best suited for your property.
CONTACT US
Ready to choose the right system for your home?
Leave a request, and our specialist will contact you, help select the right PRIMELOS system, calculate the cost, and recommend the best installation layout for your property.