Frequently Asked Questions

Q. What is Stormbloc^®?

A. Stormbloc^® is an extremely strong plastic crate of 96% void ratio, which forms a modular system for use as an infiltration system or soakaway. Each module incorporates an integral tunnel running through it, which can be used for inspection and maintenance.

Q. What size are the blocks?

A. The standard block size is 800 mm x 800 mm in plan and 660 mm in depth. We can also supply 350 mm deep blocks.

Q. Can Stormbloc^® be used below roads or car-parking areas?

A. Yes it can. The structure is extremely strong but is designed to take distributed loads and not point loads. The depth that the Stormbloc^® is buried at dictates the maximum load that can be applied.

Q. What maintenance is required for the Stormbloc^® system?

A. The patented design of the block incorporates an access tunnel, which provides access to the system for inspection and maintenance. Entry to these tunnels can be gained through the inlet pipes. Periodic inspection of the system should be made and the tunnels should then be jetted if necessary. We would suggest that a catch pit be installed upstream of the system to prevent large objects from entering the blocks. Ideally, a Downstream Defender® hydrodynamic separator is also used upstream of the system in order to remove the majority of grits and silts before they enter the system, thus providing an even greater buffer to any problems occurring.

Q. How are the inlet pipes connected to the Stormbloc^® system?

A. The system is supplied with number of end plates that attach directly to the end of the inspection tunnels. These end plates can be cut to accept pipes up to 150 mm in diameter. It is also possible to attach pipes up to 100 mm in diameter to the side of the blocks via a removable cut-out.

Q. Does the Stormbloc^® Infiltration System require stone fill on the base and sides?

A. Stormbloc^® should be laid onto a firm sub-base consisting of 150 mm of sand or gravel. Other than this there is no requirement for stone fill to the sides. Due to the high void ratio and open construction within the blocks water can move freely in all directions, as such all surfaces of the system will be utilised for infiltration into the ground.