You can use several bendable aluminium base parts to easily make inspection shafts to check operation of the water draining layer. These base parts are supplied as straight sections to save transport costs. You can bend them to form a firm square on-site at the pre-perforated positions. If necessary you can further raise the base part with various tubular cases. Covers are available in different designs. Different designs, sizes or treatments according to requirements, possible in consultation with our Metal Service Center.  However unusual the design: our product specialists will offer you the ultimate custom-made solution. 

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