本帖最后由 WeSay 于 2009-8-19 22:47 编辑 6 s- `9 ~5 H+ r * y- B' ^3 C) k& d, Y& DA sump pump is part of a building's foundation drainage system and it has been a requirement since 1988. 2 j. ]9 P4 b& a' |) [/ f. m4 P% }+ c7 H2 g9 [2 g, C$ J http://www.edmonton.ca/for_resid ... ps-residential.aspx
: y3 X% M9 i2 z2 fIn 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.