Rainwater harvesting system

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    Water can be free!

    Mains water supply including sewage treatment was getting more expensive in the past, and this will continue in the future. Since the price increase is not to avoid we shall look for alternative water sources. The best solution – Rainy’s rainwater harvesting system, which covers approximately 50% of daily water demand.

    Water is employed for different household appliances. Obviously, drinking water quality is absolutely unnecessary for some high consumption applications like toilet flushing, washing clothes, lawn or garden watering, car washing or house cleaning. Valuable drinking water may be replaced by rainwater for those activities – saving our money and natural resources


    Infiltration tunnels could be Installed for the disposal of treated wastewater where there is no suitable site for disposal. You will be able to insert purified water into the soil through infiltration tunnels easily.

    • Compact and inexpensive solution! Installation does not require lifting equipment. The required number of modules is combined into one or more rows, with both ends closed with end panels. The large volume of tunnels reduces the number of earthworks, which saves money.
    • Rigid construction. The stable column structure guarantees lorry traffic above infiltration units if the ground is at least 800 mm. The passenger car version will withstand a load of 3.5 t per square meter.
    • Cost-effective solution. GRAF infiltration units have 3 times the volume of a conventional gravel trench. One tunnel module replaces 800 kg of gravel or 36 meters of drainage pipes. By significantly reducing the amount of earthwork, infiltration blocks can save a lot of time and money.
    • Easy installation. Infiltration units can be installed in rows or blocks from one to 5 floors, depending on the specific application and the required volume. Module installation is straightforward, fast, and allows for a variety of options. No complex instruments are needed for assembly, with a unit weight of just 15 kg and possible connections.