• Hugo,
    This is more on for the DIY thread.
    What is the problem with the water build up, with the rainwater we have been getting the water will always build up somewhere. If you put the drain in the grass it will tend to fill with soil and grass and then not drain so probably better to put in line with red rectangle but that means angle grinding a bit of the concrete. Is the water build up such a problem? I have a 9" angle grinder and diamond disk if you want to borrow.

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