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1.
General information
1.1
General
Detention/retention/attenuation and infiltration systems are usually subject to final approval by the local
authority having jurisdiction. This should be investigated in the planning phase and approval sought if
required. The statutory specifications and the requirements in the relevant literature, such as national
standards and work sheets / data sheets of the national requirements standards, always apply.
Only authorised and qualified personnel should install and inspect the Graf EcoBloc Inspect system. The
following safety and installation instructions should also be noted.
An infiltration/attenuation system is usually sized in accordance with national standards. You can request
free sizing from Graf. In particular the permeability of the surrounding soil is of great significance and may
result in problems with and damage to the Graf infiltration & attenuation system if calculated incorrectly.
1.2
Safety
All work should be undertaken in compliance with the relevant accident prevention regulations according
to national standards. There is an increased risk of slipping on Graf EcoBloc Inspect in frosty and wet
conditions.
GRAF provides an extensive range of accessories, which are all coordinated and can be combined to
form complete systems. Using other manufacturer's accessories may result in the system's reduced
performance or failure and no liability for damage or costs will be accepted.
1.3
Information about operating the system
The supplementary document "Instructions for operating and maintaining the GRAF EcoBloc Inspect"
contains more information about the guidelines and obligations of installers & operators of Graf infiltration
& attenuation system.
This document also contains information about the filter elements needed to pre-treat the surface &
rainwater entering into the Graf infiltration & attenuation system.
1. General information
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