soil pipe 
noun
A sewage or waste-water pipe.The only bit that is not quite finished is the seal for the soil pipe but luckily we can still use the toilet till we get one that fits - yet another trip to the plumbers merchant for the right bit....
- He said the last two car fires burned a soil pipe at the side of a house and residents had been unable to use the toilet.
- There is obvious evidence of damp penetration adjacent to the rear external wall including the junction of the cast iron soil pipe.
- multi-daylight
- multi-denominational
- multidentate
- multidenticulate
- multi-destination
- multidialectal
- multidialectalism
- multi-diameter
- multi-digit
- multidigitate
- multidimensional
- multidimensionality
- multidimensionally
- multidirectional
- multi-disc
- multidisciplinarian
- multidisciplinary
- multidiscipline
- multidisciplined
- multi-disk
- multidomestic
- multi-drop
- multidrug
- multidrug-resistant
- multi-electrode