Pipes get blocked too easily, especially kitchen pipes. The minimum diameter for domaestic grey water pipes should be 15cm.
@chewie @anon_opin A toilet waste pipe is only 110mm. With 150mm, you could lose cups. Perhaps pets.
I shudder to think what might come *up* it, too...
@BonehouseWasps @anon_opin eww, good point.
Thanks, just going to bed 😱