GARDEN SYSTEM STANDARD WITH OCTAGON TANK 4000L

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Garden system Standard with Octagon tank 11000l

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25,283.00 PLN 5%

24,018.85 PLN tax incl

19,527.52 PLN tax excl

The lowest price of this product in the last 30 days before the discount was 22,501.87 PLN gross

Catalog number: ZWOS0024

Capacity:

Delivery individual valuation

Delivery

Delivery methods	Name	Time of delivery	Price
	Indywidualna wycena dostawy - Spedycja	Please confirm your order - delivery costs will be emailed to you as a separate proforma invoice. Shipping quote for large-volume products. Please be patient for a while.	individual valuation

Delivery time 7-14 days

Ask about the product

Rainwater use system in the garden
Top Multi Tech II submersible pump
Capacities of 4000l, 7500l or 11000l

Download PDF

Product compliance details: Manufacturer responsible for the product

Responsibility for the Product

Manufacturer MPI Group Sp. z o.o. Magazynowa 5 62-070 Zakrzewo Poland biuro@mpi.com.pl

MPI Group Limited Liability Company is a company that has been in business for more than 15 years, offering comprehensive solutions in the selection, sales, commissioning and service of environmental equipment, including rainwater management systems, tanks, water systems and filtration. The company combines manufacturing, integration and distribution activities, providing equipment for both individual and institutional customers - hospitals, schools, health centres, hotels. MPI's products are individually designed, tailored to the specific application.

MPI ensures that the products offered are certified to European standards and CE marked. The company has positive opinions of the Institute of Environmental Protection, NIZP (formerly PZH), has a technical approval of the Building Research Institute and a National Technical Assessment, which confirms that the equipment meets building and technical standards in force in Poland.

Standard garden set with Octagon EcoLine rainwater tank

High-quality garden rainwater harvesting system with flat tank and automatic submersible pump

Functional description

The gutter system collects water from the roof, which is channelled through downpipes into an underground tank. Rainwater filtration is carried out using a fine mesh basket filter on the inlet pipe to the tank. Watering the garden with a garden hose is carried out by means of a submersible automatic pump located inside the tank.

Scope of delivery

Octagon tanks - Benefits for you:

Tank sizes to choose from: 4000l, 7500l or 11000l
Minimum foundation depth, significantly less earth excavation
Environmentally friendly polyethylene - 100% recyclable
No seams, connections or welds - 100% watertight (for OCTAGON 4000, larger volumes have sealed welds)
Low weight, simple installation
Possibility of vehicle access after using a cover and superstructure for passage
Can be placed in ground water 1.0 m above the tank bottom
10-year warranty - Made in Poland

Volume [l]	Length [mm]	Width [mm]	Body height [mm]	Height with flange [mm]	Inspection hatch [mm]	Weight [kg]
4000	2450	2450	1075	1375	600	155
7500	4480	2450	1075	1375		305
11000	6510	2450	1075	1375		455

Foundation conditions for the Octagon reservoir

Cycling and pedestrian traffic over the reservoir permitted, maximum ground surface up to 1.5m. Maximum ground water level up to 1.0 m above the bottom of the reservoir.
Passenger vehicle traffic permitted 4.8 kN/wheel (minimum ground surface 0.6 m, maximum 1.5 m). Maximum ground water level up to 1.0 m above the tank bottom.
Depending on the type of load, a class B, C or D finial must be fitted to the tank. Use a relief ring, relief cone or relief plate over the tank and a matching manhole of the appropriate class.

Simple groundwater conditions (no groundwater, permeable soils)

Backfill the tank with washed gravel (8/16 mm) free of impurities. Backfill in layers of 10 cm and compact by hand.

Difficult ground conditions (presence of ground water, impermeable ground)

Backfill with 20-30 cm of lean concrete. Complete the remainder of the excavation with a layer of gravel.

For more installation details, please refer to the manufacturer's instructions in the "download" tab.

The Octagon tank can be fitted with:

Tank cover - TwinCover with intake

The tank cover has a smaller inner lid in it for quick and easy access to the water intake.

Ascending pipe VS 20

Height 235 mm, Ø 600 mm.

Gasket DN 600

Lip seal used between the ascending pipe and the spacer ring. Protects the rainwater storage tank from outside contamination.

Cut-out basket filter

Recommended for roof areas of up to 350^m2. The basket is placed over the inlet pipe in the tank. Dimensions: Ø 410 mm, height 160 mm fine filter (filter mesh size 0.9 mm). Fastening ropes and a hook are included with the basket.

Pressure hose 3.5 m

A 3.5 m pressure hose used to connect the pump to the water intake, located in the tank lid.

Pedrollo TOP Multi Tech II pump *.
TOP MULTI-TECH pumps are recommended for pumping clean water and liquids that are not aggressive to pump materials. Due to their high efficiency and reliability, the pumps are used to supply drinking water tanks and wells, to draw rainwater from cisterns for water gardens or for use in irrigation systems, etc. A switch inside the pump starts or stops the pump automatically when the tap is opened or closed.

Pedrollo TOP Multi Tech II pump *.

TOP MULTI-TECH pumps are recommended for pumping clean water and liquids that are not aggressive to pump materials. Due to their high efficiency and reliability, the pumps are used to supply drinking water tanks and wells, to draw rainwater from cisterns for water gardens or for use in irrigation systems, etc. A switch inside the pump starts or stops the pump automatically when the tap is opened or closed.

Pump specifications

Model	Power supply			Capacity		Nipple diameter
Model	phase	[kW]	[HP]	Q [l/min]	H [m]	Discharge
TOP MULTI-TECH 2	1-phase	0,55	0,75	80	42	1 ¼"

TwinCover cover instructions

Description and installation instructions for TwinCover

Rising tube VS60 VS20

Description and installation instructions for VS60 and VS20 ascending pipe

Basket filter instructions

Description and installation instructions for the basket filter

TOP MULTI TECH

Data sheet for Top Multi-Tech Pedrollo pump

Octagon instructions

Octagon tank installation instructions

Octagon and Octagon Light leafle

Octagon and Octagon Light tank flyer

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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Nazwa	Capacity	Unit price
Garden system Standard with Octagon tank	4000l	~~12,290.00 PLN~~ – 5% 11,675.50 PLN Brutto 9,492.28 PLN Netto
Garden system Standard with Octagon tank	7500l	~~19,275.00 PLN~~ – 5% 18,311.25 PLN Brutto 14,887.20 PLN Netto
Garden system Standard with Octagon tank	11000l	~~25,283.00 PLN~~ – 5% 24,018.85 PLN Brutto 19,527.52 PLN Netto