JFC’s Attenuation Water Management solutions help control the rate at which water enters the watercourse or storm drain. Our industry leading patented products can be deployed in Infiltration, Permeable and Impermeable Attenuation systems, which makes their range of applications incredibly broad.
Its superior design makes it suitable for building storage tanks under HGV trafficked and car park areas as well as non-trafficked areas (e.g. green amenity areas). JFC HydroChambers have many advantages over other similar products including BBA certification for HGV loading, superior structural strength, silt management, maintenance and inspection capabilities and cost effectiveness.
The HydroChambers are manufactured from high density polyethylene plastic and are backfilled with 35/50mm clean washed crushed stone. The corrugated arch shape of the HydroChamber provides excellent structural strength as shown in independently witnessed field tests where the chambers were exposed to loads 3.5 times greater than that expected in service.
A site audit will determine the most suitable system.
*System storage is dependent on foundation depth, distribution pipe diameter and the overall system size.
See HydroChamber calculator for more details.
The HydroChamber is a unique attenuation system that minimizes the entrance of grit / silt due to the two upstream catch-pit manholes. Standard drain cleaning and inspection equipment allows maintenance and inspection to be conducted on the main distribution pipe. Chamber rows can be camera inspected as required.
JFC offer a number of options when supplying and installing a Stormwater management system
All JFC Stormwater management solutions include full excavation drawings
JFC also offer a number of services to enhance the supply and installation of the Stormwater management system.
*System storage is dependent on foundation depth, distribution pipe diameter and the overall system size. See HydroChamber calculator for more details.
The JFC OriChamber is a prefabricated unit which comprises a Twinwall Chamber with base. 110mm internal and outlet pipework and a pedestrian duty (bolt down) cover. The unit is available in two standard depths of 1.0m and 1.5m incorporating a 150mm sump. (other depths available to order).
Fitted with a 110mm overflow pipe complete with debris cowl, the pipe and cowl can be removed if the orifice becomes blocked which allows the system to drain down and the blockage removed.
Two number 110mm inlet connection seals are supplied loose with a hole saw enabling them to be fitted easily to the required level and orientation on-site. This offers unique flexibility to the user.
The internal pipework is assembled from 110mm pipework and has an end cap which can be drilled with a certain diameter hole, based on the design flow and design head required (see table below). For specific head and flows contact JFC Civils Technical Team.
It is very easy to install. One half is placed either side of where the pipe is to pass through the impermeable membrane or GCL layer. When bolted back to back the impermeable layer becomes sandwiched between the units offering a tight seal. The impermeable layer is then trimmed away from the inside of the joint and a standard twinwall CorriPipe™ can be attached
Interceptors remove pollutants from effluent and allow cleaner water to pass into a surface water drainage system. Pollutants are retained for removal and disposal. Interceptors work by allowing the pollutants and water to naturally separate. Pollutants float to the surface of the water for easy removal. Silt settles within the unit and can be easily removed. All JFC Interceptors are manufactured to IS EN ISO; 9001:2000 and conform to European Standard PR EN 858 – 1 & 2.
|Product Code||Drainage Area m²||Peak Flow (L/s)||Nominal Flow (L/s)||Oil Storage (L)||NSB Ref|
Best management practices should be maintained to ensure a clean network at all times. Sinkable solids and floatable contaminants should be prevented where possible from entering the unit by means of a dedicated silt traps and/or sumped catchpit manhole (s) upstream thus preventing potential problems.
It is important to note that a large amount of the settable solids are present in the network during construction and this is mainly due to the silt/grit present in construction runoff. To account for this, the following inspection and maintenance guidelines are recommended as best management practice:
A surface level lid allows a tool be inserted into the circular shaft connecting with the stop valve. This tool is rotated to open or close the stop valve which will turn on or off the mains water supply.
|STC||Stop Tap Chamber|
|1TST/TH||Circular Sleeve / Top Hat|
|1TST 0.75||0.75 CorriPipe Length|
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