The Ontario Building Code | Venting of Sanitary Sewage Sumps

7.5.5.1. venting ="http://thehandyforce.com/interior/bathroom-renovations/" title ="Toronto Bathroom renovation inspiration">venting of sanitary Sewage Sumps

(1) Every sump or tank that receives sanitary sewage shall be provided with a vent pipethat is connected to the top of the sump or tank.