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G-bone714 t1_iuhkr13 wrote

I would cut an arch in the front of the pipe (where the 1 is) and leave it as is.

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altreunau OP t1_iuhph7y wrote

The arch would help prevent water splashing back behind the white halfpipe?

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G-bone714 t1_iuhq4tb wrote

I think so because the back wouldn’t be cut out at all. The white half pipe will act as the bend. I’ve done this and it worked fine. You can still go back to your original plan if you don’t like the results.

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altreunau OP t1_iuhs48c wrote

Yeah the problem is, the white half pipe isn't secured, so I'd still be concerned that it could shift downwards e.g. kicked, heavy storm, wind etc. and the water would still flow back against the wall. So I think I'll go with my original solution.

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