本帖最后由 WeSay 于 2009-8-19 22:47 编辑 : U C. Y5 f% q: e- q, F' j o5 G3 y$ M! v1 U5 h+ R# b6 A
A sump pump is part of a building's foundation drainage system and it has been a requirement since 1988. |3 [! w% O& g# C' C0 ~- X8 L! T http://www.edmonton.ca/for_resid ... ps-residential.aspx
* k% f! c B9 V2 cIn newer areas the sump pump discharges onto the ground, with the exception of areas that have a very high ground water table, or those adjacent to a lake, ravine or river. In those areas, sump pumps must connect to a storm service pipe to minimize soil erosion. A geotechnical engineer determines if this is necessary before the area is developed.