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creeping tunnel for underground 3m long
D=80cm, colour: black/green
We recommend to shorten the pipe ends only vertically and not to cut them diagonally. In order to avoid backwater, the pipes should be installed with a minimum gradient of 2 %. We also recommend installing the pipe approx. 10 cm above the rest of the playground area. Due to the smooth inside, the tube is particularly easy to clean from the inside, e.g. with a high-pressure cleaner or a mop, and compared to the traditionally used concrete tubes, it has a significantly reduced risk of injury as well as a much better feel and durability.