Stub stack vs. stub waste

[Shevek]

Is there any difference between a "stub stack" and a "stub waste"? Or are they the same thing?

 

[Shevek]

Answer = yes:
http://www.marleyplumbinganddrainage.com/uploads/docs/2186.pdf

Stub stack:
"An unventilated stub stack terminated with an access fitting may be used to connect a group of ground floor appliances to the building drain provided the vertical drop to the invert level of the drain does not exceed 1.5m from a WC and 2.5m from a waste appliance. Where one or more stub stacks are connected to the same drain, the head of the run should be ventilated to atmosphere or air admittance valves fitted to each stub stack arrangement."

Stub waste:
"This technique is often used to connect isolated ground floor waste appliances such as basins, baths, shower trays and sinks to eliminate exposed pipework or low level ducting. The 110mm unventilated PVCu drain is terminated at finished floor level with a reducer and boss adaptor to suit the size of waste from the appliance."