Rainwater tank set Jumbo Inox
Pack description
Decorative rainwater tank Jumbo 800 l
A ¾" diameter hole with female thread is provided for collecting rainwater. It is located on the front wall of the tank. A faucet can be placed in it for convenient water retrieval (e.g. for filling a watering can). On the side walls there are ¾" internal threads for connecting a pump or for connecting more tanks. On top of the Jumbo tank is a small inspection hole (Ø 10 cm) through which the tank can be cleaned. A metal angle bracket is included, together with mounting screws, which serve to fix the tank to the wall. This prevents the tank from tipping over in the event of strong gusts of wind.
We recommend the use of a rainwater collector with a filter to collect rainwater. The manufacturer provides a 2-year guarantee for the product.
Jumbo tank dimensions
- Width 80 cm,
- Depth 60 cm,
- Height 179 cm,
- Capacity 800 litres.
Colour variants to choose from:
- Granite (9000510),
- Sand (9000520),
- Green (9000530),
- Black (9000540),
- Platinum (9000550).
Tap with male thread
Dedicated faucet for decorative rainwater tanks
Rainwater collector with mesh filter for guttering
Rainwater catcher with mesh filter, mounted on the downpipe
Compared to the previous model, the range of possible gutter diameters has changed. The new model fits gutter diameters from 68 to 100 mm. Please see the download area for additional information and installation instructions.
Principle of operation of the collector with mesh filter
Connection kit rainwater collector-tank for tanks without removable cover
Dimensions of the collector-tank connection set:
- Diameter: 32 mm
- Length: 30 cm
DIAGRAM OF A COMPLETE RAINWATER STORAGE TANK SET

To complete a complete garden rainwater harvesting tank set you need to :
1. select a DECORATIVE TANK, which matches the colour scheme of your surroundings and has a capacity suitable for you.
2. measure the diameter of the downpipe and select a suitable RAINWATER COLLECTOR .
3. match the diameter of theconnecting hose between the collector and the tank (most collectors have an outlet of 32 mm)
4. match the TANK with the colour of the rainwater tank.
If you wish, you can equip the set with a DRAIN HOSE to empty the tank during winter.
INSTALLATION DIAGRAM OF THE COLLECTOR

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.
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.
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.
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.

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.