Liberty Pumps 257 is a 1/3HP Automatic Submersible Sump with with magnetically operated erectile float VMF switch and 10ft power cord. Turn-on level of the not adaptable switch is '' and turn-off level is 3-1/2 ''. This pump can in a smaller 10 '' diameter sump pit.The Liberty Pumps 257 has 1-1/2 '' NPT discharge, 1/2 '' solids-handling, 18 ' shut-off head, a unparalleled one-piece cast iron housing and thermally covert permanently lubricated motor.For Sump and De-watering Applications exclusive. This erectile magnetized Float -LRB- VMF -RRB- model is not for wastewater applications overdue to their sawed-off On/Off cycle. Wide angle float models -LRB- Liberty Pumps 251 and 253 -RRB- are better for wastewater applications and are easily adaptable for disparate On/Off levels.For added protection, consider the addition of a back-up pump specified as Liberty 's SJ10 SumpJet, as well as an alarm specified as Liberty 's ALM-2 in applications where loss of pump function could result in property damage. If an alarm is exploited, it must be to a divide physical phenomenon circuit.CAUTION Do not let the pump run ironic.