For an overview of what requires SAB approval and for more detailed guidance, please visit the Welsh Government website at: Sustainable drainage systems (SuDS): guidance.
I gael trosolwg o'r hyn sydd angen cymeradwyaeth SAB arno ac i gael canllawiau manylach, ewch i wefan Llywodraeth Cymru yn: : Systemau draenio cynaliadwy (SuDS): canllawiau.