本帖最后由 WeSay 于 2009-8-19 22:47 编辑 ) a7 n/ e( ^ c4 Z8 k+ K3 o5 E) J2 B" O! Z* f1 h
A sump pump is part of a building's foundation drainage system and it has been a requirement since 1988. # G# `6 S0 N! b: b6 Z. ?& ^7 Q( S& B) d http://www.edmonton.ca/for_resid ... ps-residential.aspx
) U: {: W3 G2 m% ^In 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.