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Can the combi boiler PRV/overflow pipe go into the washing machine waste? I have just moved into a flat and the boiler pipe seems to merge in a T connector with the grey water pipe from my washing machine.
Sometimes it takes a long time to empty and I wonder if this is to do with the boiler. There is a lot of gurgling and it seems like air might be blocked in the pipe which is a bit worrying because it is connected to a gas boiler.