Easy separation of rainwater discharge

Hydrorock type BD

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Easy to install
Immediately ready-to-use
100% environment friendly
Lifelong functioning
100% Dutch

Environmentally friendly rainwater seperation

Rainwater separation made easy and effective with our Type BD Hydrorock units.

This product features a built in Ø 100 perforated tube for connection to the rainwater discharge. The unit’s unique and natural material rapidly absorbs rainwater and ensures a gradual infiltration of excess water into the surrounding soil.

With a sufficient number of units, connection to the sewage system is no longer necessary and the groundwater is replenished naturally. This dramatically decreases the chances of flooding.

Also applicable for rainwater separation of…

  • surface water drains and other drains situated in paved areas;
  • rainwater drainage systems of homes, businesses, carports and garages;
  • rainwater drainage systems of commercial business locations and heavily load industrial areas.

Multifunctional Filter cloth

The filter cloth that surrounds the Hydrorock blocks has, besides the aesthetic property, several important functions:

  • The basic version of the membrane (standard version) ensures the same delivery speed to the bottom as a bare block of stone wool.
  • Prevent influx of small particles; ground or dust
  • Fractions on corners and edges are prevented
  • Handling and placing the blocks is easier
  • Growth of roots is prevented
  • Dimensioning of the blocks is more flexible
  • When placing, transporting and processing people do not come into contact with the bare stone wool
  • The filter membrane can be manipulated, so water infiltration can be delayed if desired. The infiltration direction can also be determined by treating the membrane.

Easy installation type BD

Hydrorock® block are available in slim blocks of different sizes. The enormous buffering capacity and its dimensions limit the necessary digging activities. The blocks are placed either next to each other or behind each other and thus form the desired buffering and infiltration system.

Always fitting for each desired capacity and situation. Only the digging of small trenches is required and the cost for the removal of surplus soil is limited. In other words, flexibility and simplicity.

Type BD Rainwater separation & infiltration
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Type BD-HD Rainwater separation & infiltration – High Density
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Product Data Sheet Hydrorock 2019 English
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Completely closed off separation system

With the Hydrorock separation system you can disconnect the rain water drains from the sewer system 100%. Next to the separation of your drainpipe, Hydrorock also provides solutions for rainwater separation of other drains such as line trenches and wells.

With the closed Hydrorock system, connection to the sewer or surface water is not necessary.

Move the line to see the difference between above and under ground

Move the line to see the difference between above and under ground

Bring on the rain

Many countries in the world are facing extreme downpours where a significant amount of rain falls within a short period of time. With the Hydrorock separation system, there is no need to worry about this any longer. Together with one of our very knowledgeable sales representatives, a calculation is made for your specific situation.

The Hydrorock separation system safeguards your personal property against extreme torrential showers.

Calculate your amount of Hydrorock units

The amount of Hydrorock units you require depends on the situation in which you intend to use them for.

Type Infiltration capacity Dimensions (lxbxh) Weight Construction depth Max. load per m2 Amount of rain mm per m2 Required number Total Buffer
BD112 112 liter 120x30x33 cm 9 kg 63 cm 2500
Type BD112
Infiltration capacity 112 liter
Dimensions (lxbxh) 120x30x33 cm
Weight 9 kg
Construction depth 63 cm
Max. load per m2 2500
Amount of rain mm per m²
Required number
Total Buffer
BD170 170 liter 120x30x50 cm 13.5 kg 80 cm 2500
Type BD170
Infiltration capacity 170 liter
Dimensions (lxbxh) 120x30x50 cm
Weight 13.5 kg
Construction depth 80 cm
Max. load per m2 2500
Amount of rain mm per m²
Required number
Total Buffer
BD220 220 liter 120x40x50 cm 15.5 kg 90 cm 2500
Type BD220
Infiltration capacity 220 liter
Dimensions (lxbxh) 120x40x50 cm
Weight 15.5 kg
Construction depth 90 cm
Max. load per m2 2500
Amount of rain mm per m²
Required number
Total Buffer
BD340 340 liter 120x30x100 cm 27 kg 130 cm 2500
Type BD340
Infiltration capacity 340 liter
Dimensions (lxbxh) 120x30x100 cm
Weight 27 kg
Construction depth 130 cm
Max. load per m2 2500
Amount of rain mm per m²
Required number
Total Buffer
BD440 440 liter 120x40x100 cm 35 kg 140 cm 2500
Type BD440
Infiltration capacity 440 liter
Dimensions (lxbxh) 120x40x100 cm
Weight 35 kg
Construction depth 140 cm
Max. load per m2 2500
Amount of rain mm per m²
Required number
Total Buffer
D34 34 liter 120x15x20 cm 2.7 kg 35 cm 2500
Type D34
Infiltration capacity 34 liter
Dimensions (lxbxh) 120x15x20 cm
Weight 2.7 kg
Construction depth 35 cm
Max. load per m2 2500
Amount of rain mm per m²
Required number
Total Buffer
D45 45 liter 120x20x20 cm 3.6 kg 40 cm 2500
Type D45
Infiltration capacity 45 liter
Dimensions (lxbxh) 120x20x20 cm
Weight 3.6 kg
Construction depth 40 cm
Max. load per m2 2500
Amount of rain mm per m²
Required number
Total Buffer
D112 112 liter 120x30x33 cm 9 kg 63 cm 2500
Type D112
Infiltration capacity 112 liter
Dimensions (lxbxh) 120x30x33 cm
Weight 9 kg
Construction depth 63 cm
Max. load per m2 2500
Amount of rain mm per m²
Required number
Total Buffer
D170 170 liter 120x30x50 cm 13.5 kg 80 cm 2500
Type D170
Infiltration capacity 170 liter
Dimensions (lxbxh) 120x30x50 cm
Weight 13.5 kg
Construction depth 80 cm
Max. load per m2 2500
Amount of rain mm per m²
Required number
Total Buffer
D220 220 liter 120x40x50 cm 15.5 kg 90 cm 2500
Type D220
Infiltration capacity 220 liter
Dimensions (lxbxh) 120x40x50 cm
Weight 15.5 kg
Construction depth 90 cm
Max. load per m2 2500
Amount of rain mm per m²
Required number
Total Buffer
D340 340 liter 120x30x100 cm 27 kg 130 cm 2500
Type D340
Infiltration capacity 340 liter
Dimensions (lxbxh) 120x30x100 cm
Weight 27 kg
Construction depth 130 cm
Max. load per m2 2500
Amount of rain mm per m²
Required number
Total Buffer
D440 440 liter 120x40x100 cm 35 kg 140 cm 2500
Type D440
Infiltration capacity 440 liter
Dimensions (lxbxh) 120x40x100 cm
Weight 35 kg
Construction depth 140 cm
Max. load per m2 2500
Amount of rain mm per m²
Required number
Total Buffer

Why separate rainwater with Hydrorock?

The current flooding issues continue to be a source of major problems in urban areas. In many cases, rainwater that reaches the sewer via rain pipes is the cause. During periods of heavy rainfall, sewers overflow causing major issues in the surrounding area. Many local authorities aim to infiltrate as much rainwater into the soil instead of unnecessarily directing it to water treatment plants. It is for this reason that rainwater separation is mandatory for new development sites.

Urbanisation goes hand in hand with a significant increase in paved areas and therefore an increase in water supply to the sewer system. But the sewer system has not been dimensioned for this increase in many cases. With Hydrorock, rain water is separated from the system, buffers under the existing infrastructure and infiltrates into the surrounding soil. The result is a significantly smaller chance of flooding.

Simple and effective separation is possible with our  Hydrorock Type BD units. Easy and effective buffering and infiltration made possible with our Hydrorock Type D units.

View our composition

93

%

Hydrorock maximum storage capacity of total volume

Frequently Asked Questions

Here you will find a selection of frequently asked questions. Your question might be among them!

Cannot find your question?

info@hydrorock.nl

+31 (0)10 30 20 000

's-Gravelandseweg 246

3125 BK Schiedam

The Netherlands

Where can I find the Hydrorock price overview?

For the most current prices, we advise you to contact your nearest Hydrorock International dealer. Look here for an overview of suppliers of Hydrorock solutions. They will be happy to make a customized offer for you. For prices and online ordering of individual Hydrorock® products you can look at the various web shops.

Is Hydrorock resistant against erosion by plant- and tree roots?

Hydrorock is produced from stone wool, a 100% natural material. It remains underground for decades in optimum condition. Hydrorock is resistant to erosion by plant and tree roots and will continue to function well for years. The cotton-based membrane of filter cloth does not mold or rot. It has a high breaking strength and is resistant to the natural substances in the soil. Stone wool is 100% recyclable. Flora and fauna thrive excellently on Hydrorock.

Can Hydrorock be used with high groundwater levels?

The infiltration blocks must always remain above groundwater level. The blocks would otherwise be filled with groundwater instead of surface water. Therefore, always check the groundwater level before you start construction. Local groundwater monitoring networks or the DINO counter (Data and Information from the Dutch Subsurface) can help you with this. At a high groundwater level, it is possible to work with blocks that have a lower height, such as the types D34 or D112.

How many Hydrorock infiltration blocks do I need?

The number of required Hydrorock® blocks depends on the surface, the groundwater level and the soil type. Use our calculator to calculate how many blocks you need. Our calculator for disconnecting rainwater can be found here. Look here for solutions to prevent flooding

How are the infiltration blocks placed?

Hydrorock blocks have a fine-grained fiber structure in one direction. A horizontal fiber direction promotes a drainage function. A vertical fiber direction promotes an infiltrating function. Due to the load-bearing capacity of the blocks, these must always be positioned in a vertical position for buffering and infiltrating action (the sticker with the text "this side up" is then on top). If bearing capacity is of secondary importance, the blocks can also be used horizontally for drainage purposes of surface and rainwater. For optimum drainage, we recommend placing the blocks one behind the other and in a horizontal position (lying down). You will find the placement instructions in the here.

More answers

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