PipeLine wastewater retention tank Moderntank
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PipeLine retention tank by Moderntank 20-100m3

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  • Wide range of applications
  • Durability of up to 50 years
  • 20-100m3 capacity
  • From SN2-SN16

 

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Product compliance details: Manufacturer responsible for the product

Responsibility for the Product

ModernTank

Manufacturer ModernTank Sp. z o. o. Magnuszowice 53 a 49-156 Gracze Poland biuro@moderntank.eu

ModernTank Spółka z ograniczoną odpowiedzialnością is a Polish manufacturer offering a wide range of reservoirs (retention tanks, fire tanks, aboveground tanks, underground tanks), DrainLine PEHD pipes and other water, sewage and sanitary system components. The company provides complete design, manufacturing and installation solutions, meeting the needs of the municipal, industrial, agricultural and construction sectors. ModernTank relies on modern technologies, solidity of workmanship, durability of materials (mainly high-density polyethylene - PEHD), and adaptation of products to utility requirements and safety standards. The ModernTank production facility is a modern 20,000 m² facility in southern Poland.

Modernity, quality and compliance with the requirements of standards and legislation are confirmed by the numerous certificates, attestations and performance evaluations held by ModernTank. These include the Hygienic Attestation of the PZH for products in contact with drinking water, the National Technical Assessment issued by the Road and Bridge Research Institute, and assessments issued by the Building Research Institute for construction products and characteristics relevant to the safety of buildings.

PipeLine retention tank

The PipeLine retention tank is a modern and durable solution for the storage of various liquids. The retention tanks are dedicated to rainwater, drinking and process water, industrial and sanitary wastewater as well as agriculture. They are made of high-quality cross-linked polymers - polyethylene. They provide high resistance to corrosion, chemicals, mechanical damage and abrasion. With a variety of parameters and stiffness classes, the tanks are designed for a wide range of applications.

PipeLine underground tanks range in diameter from 800 mm to 3,000 mm. Circumferential stiffness SN2 - SN16. Available capacities from approximately 20 m³ to 100 m³ (single-piece) and even several thousand m³ (large-scale). Tanks are made to individual customer specifications. For this purpose, please contact us.

Available capacities

  • As standard, tanks are manufactured from 25 m³ (single units).
  • Capacities smaller than 25 m³ are only realised for multi-series orders (several pieces) - feasibility to be determined individually.

Advantages of the retention tanks:

  • High corrosion, chemical and UV resistance.
  • Parameters tailored to individual requirements.
  • Can be installed in areas subject to vehicle traffic.
  • Resistance to static and dynamic loads (circumferential stiffness SN2 - SN16).
  • Durability and tightness over the entire service life (declared durability of up to 50 years).
  • Possibility of installation in difficult soil and water conditions.
  • Low operating and installation costs.

Types of retention tanks:

PipeLine retention tanks are tailored accordingly to the specific task. Please submit an individual enquiry for this purpose. Our product range includes tanks designed for:

  • Rainwater
    Rainwater tanks enable rainwater to be efficiently collected and stored. It can be used for watering gardens, irrigation systems or washing vehicles. Rainwater retention tanks are available in a variety of capacities and can reach even larger capacities by being combined into batteries. Documents: ITB National Technical Assessment, IBDiM National Technical Assessment.
  • Drinking water
    Tanks used when there is no or limited access to a drinking water source. Specially approved drinking water tanks ensure the safe storage of drinking water. Usually made of high density polyethylene (PEHD). They have the relevant documents (PZH Attestation, ITB National Technical Assessment).
  • Technological water
    These tanks are designed to store water used in technological processes. They show high resistance to static and dynamic loads, making them ideal for use in harsh industrial environments. Documents: ITB National Technical Assessment, IBDiM National Technical Assessment.
  • Industrial wastewater
    Thanks to their exceptional resistance to aggressive chemical compounds, industrial wastewater tanks are dedicated to the storage of industrial wastewater. They are equipped with additional safeguards to ensure watertightness and durability under harsh conditions. Documents: ITB National Technical Assessment, IBDiM National Technical Assessment.
  • Sanitarysewage
    Sealed tanks for sanitary sewage can be used as septic tanks. Septic tanks are characterised by their resistance to corrosion and chemicals, making them a reliable solution for households and municipalities. Documents: ITB National Technical Assessment, IBDiM National Technical Assessment.
  • Agriculture
    Tanks designed for agriculture are used to store liquid fertiliser, slurry or silage juices. They can be additionally equipped with pumping systems and protection, which increases their functionality. The tanks can be easily repaired without losing their properties.

    Standard equipment of PipeLine tanks for agriculture:
    - valve with external thread or fireman's connection
    - filling line for the tank
    - sealed manhole
    - Transparent liquid level indicator for quick (visual) control of filling.

    Optional equipment for PipeLine tanksfor agriculture:
    - submersible pump
    - SMS module with RSM notification
    - ladder with platform
    - catch sump
    - double-chamber tank option
Circumferential stiffness grades according to EN ISO 9969:

Each tank is adapted to the specific application by means of an appropriately selected circumferential stiffness (SN) class. Depending on the requirements and soil and water conditions, the tanks offer stiffnesses ranging from SN2 to SN16, allowing them to be installed in a wide variety of environments:

  • SN2 - SN4: Designed for light ground conditions, e.g. for installation in shallow depths or in low-load areas.
  • SN6 - SN8: Optimal for sites with moderate soil and water conditions where the tank is exposed to medium static and dynamic loads.
  • SN10 - SN16: Dedicated to difficult conditions, e.g. in areas with high groundwater levels, high soil loads or where the tank must withstand additional mechanical loads, e.g. under car parks or roads.
Thanks to the wide range of stiffness classes available, each tank is optimally adapted to the user's requirements and local installation conditions.

This short guide will help you choose the right capacity for your underground rainwater storage tank - without difficult formulas. We will show you how to estimate your needs, count the amount of water from your roof, select the capacity and plan a simple garden installation.

Step 1: Determine what you will use the rainwater for.

List the uses: watering the garden, flushing toilets, laundry, washing the car, housework. This will allow you to estimate the real need for water in a typical week.

  • Garden watering - take a guideline of 20-25 l/m² per month per season.
  • Toilet flushing - approximately 35-50 l/person/day.
  • Laundry - approx. 15-20 l/person/day.
It is advisable to select a tank for 2-3 weeks of typical use - in practice there is no point in storing 'for the whole year'.

Step 2: How much water you collect from the roof (no complicated formulas)



In simple terms, assume: annual rainfall × roof area × runoff coefficient. For most roofs, you can assume a coefficient of around 0.9 (depending on the roofing and the layout of the gutters).


Brief example: calculation of possible rainwater yield

Roof 120 m², annual rainfall ~600mm (approx. 600 l/m²). Estimate: 120 × 600 × 0.8 ≈ 57,600 l/year. This figure helps to select the capacity for a period without rain. And a period without rain can last for 3 weeks. Therefore, you must divide the result by 21 days. That is: (57600 l /365 days)*21 days = 3314 l, the result according to the estimation should be taken as a minimum. Therefore then we choose 4000l , 5000l, 6000l tanks - because of how we will use the rainwater.

Step 3: Selecting the tank capacity

It is most practical to select a tank that will store a supply of water for 2-3 weeks of your needs.

Schemat obliczania pojemności zbiornika na deszczówkę – opad roczny × powierzchnia dachu × współczynnik spływu
How to calculate capacity: annual rainfall × roof area × runoff coefficient ≈ annual amount of rainwater to be collected.

  • 2000-3000 l - small garden, 1-2 people.
  • 4000-6000 l - family of 3-4 people + garden 200-300 m².
  • 8000-10 000 l - larger garden, intensive watering. 300 m² - more , and with automatic watering.
But you will do this more precisely using the selection calculator below:

If you prefer, open the calculator in a new tab: Tank selection calculator. If you have any problems, please contact our customer service.

Step 4: Tank selection - material

In detached houses, underground rainwater tanks are the best choice - they do not take up space in the garden, provide stable temperatures, no water freezing and allow larger capacities without affecting aesthetics.

The best material is PE, HDPE, MDPE plastic - it is lightweight, corrosion resistant, easier to install and above all airtight for many years .
It is worth paying attention to water and ground conditions. If the ground water level is high or the soil is clayey, flat tanks such as the F line, Bolt, Eco line Slim, etc., are the best choice.
On the other hand, if the conditions are normal, any solution can be used. If you have any problems, please contact our customer service.

Step 5: Simple installation in the garden

The simplest arrangement: gully filter in front of the tank or basket filter, underground tank, floating intake, automatic pump and point of use (tap). This makes watering convenient and economical.


Podlewanie ogrodu deszczówką ze zbiornika podziemnego – przykład zastosowania w domu jednorodzinnym

Summary:

  • Estimate the weekly consumption (garden + house).
  • Calculate the roof potential (rainfall × area × ~0.9) and divide by 365 days and multiply by 21 days ( 2-3 weeks of drought).
  • Select an underground storage tank taking into account the yield (calculated from the roof area) and contrast it with the consumption e.g.: water in the garden. Select capacity
  • Add a filter, pump and collection point, or choose an off-the-shelf solution: Rainwater systems for the garden

FAQ: How to choose a rainwater storage tank

What capacity to start with?

For example: family of 3-4 people + garden of 80-150 m² → 4000-6000 l usually works well. Larger garden / intensive watering → 8000-10 000 l. Verify with the calculator above.

Is it possible to supply toilets with rainwater?

Yes - using a suitable system (rainwater control unit/automatic switchover) and filtration.

What about excess water?

Plan an overflow to an infiltration or rainwater drain in accordance with local regulations.

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