Portuguese to English Other Architecture

Good evening! I am not sure what "bacia sanitária" means in this context. I wonder if it's "toilet bowl" (vaso sanitário), "bathtub" (banheira), or just "sanitary basin"?


I searched Google images for "bacia sanitária" and see pictures of both (toilet and bathtub/ vaso sanitário e banheira):

http://images.google.com.br/images?hl=pt-BR&client=firefox-a...




HERE'S THE CONTEXT (some sentences have already been translated):

PROCEDURES FOR THE DEVELOPMENT OF THE HYDRAULIC PROJECT


1.2 -Definition of the Systems to be designed:

Cold water, hot water, fire (hydrants, sprinklers, etc), sanitary sewage, pluvial waters, gas, others.

1.3 -Definição da utilização do tipo de** bacia sanitária** a ser utilizada com caixa acoplada ou válvula de descarga.


THANKS A LOT!