本帖最后由 WeSay 于 2009-8-19 22:47 编辑 * p& R y6 x- o( y" d' a
7 j. i" @1 k$ v& n* n0 @: HA sump pump is part of a building's foundation drainage system and it has been a requirement since 1988. 6 J& B$ Y7 w. l* C0 L$ o$ R& M! E" [8 O, h http://www.edmonton.ca/for_resid ... ps-residential.aspx
{' y! R% O. H* k* ?" 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.