The SPDT float switch can be used to control a pump in tank-filling or tank-emptyinng operation. Contacts located in the float will switch a 12 degrees above and below horizontal. Use a pipe clamp or cable tie to secure the cable to a pipe or weight in tank. The length of able from clamp to float determines the difference beween turn-on leel and turn-off level. for larger pumps, use float switch to turn a relay on and off and let relay contacts control pump. Safe for domestic water systems. ON WHEN FULL is used to turn on a pump when a tank is full and pump it down. OFF WHEN FULL turns the pump of when a tan is filled. These are SPST switches. 2 year warranty.
WP11748 SPDT three-wire: max amps is 5 WP11749 On when full: max amps is 13 WP11750 Off when full: max amps is 13 WP11751 On when full: max amps is 25 WP11752 Off when full: max amps is 25
Float Switch SPDT 
The SPDT float switch can be used to control a pump in tank-filling or tank-emptyinng operation. Contacts located in the float will switch a 12 degrees above and below horizontal. Use a pipe clamp or cable tie to secure the cable to a pipe or weight in tank. The length of able from clamp to float determines the difference beween turn-on leel and turn-off level. for larger pumps, use float switch to turn a relay on and off and let relay contacts control pump. Safe for domestic water systems.