20221020 17343500 1.0 TRUE Low PressureFlush MAIN City of El Cajon Sewer Mains as of January 16, 2014.Code definitions: A = Alarm, B = Buried, D = Drop, E = Extra Maintenance, M= Meter, S = Siphon, Y = By-Pass.SubType for the Mains are based on pipe diameter; Main are 6" - 29", Trunk Line are 30" and Greater, we show some Lateral which are 4"- 8" in diameter. City of El Cajon.