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Adrian_P

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Hi. If I want to connect bath and shower wastes so they come out of the same pipe to the soil stack, what size does it have to be? 50mm?
I've read that I need and anti-syphon valve too, as the shower waste run will be over 2 meters, under the bath. Do the bath and shower wastes have to be 40mm or 32, before joining the 50mm? Thanks
 

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