PURCHASE INFORMATION
Installation Instructions
A fuse and manual override switch are recommended with the installation of a
Dual System 257.
1. Run bilge pump until all possible water is pumped out. The amount of water
left in the bilge is the standing water level.
2. Disconnect the battery.
3. Mount the 257 at any angle above the standing water level. The bottom of
the water sensor should be at the desired high water level to be detected.
4. Follow the wiring schematic for the 257 as illustrated in the diagram below.
5. Connect the 257’s tan wire to the positive wire from bilge pump.
6. Connect the 257’s black wire to the negative side of battery or to ground.
7. Connect the 257’s red wire to the positive side of the battery through a fuse.
8. Connect the 257’s white wire to the positive side of the auxiliary system
(secondary pump, audible alarm, buzzer, etc...).
Maintenance
The Water Witch requires little maintenance other than periodic cleaning of the
sensors. Ordinarily this consists of hosing it down with fresh water and wiping it
off with a clean rag or towel. Some high foaming detergents or high concentra-
tion of fish “slime” can delay or prolong cycle times and require more frequent
cleaning of the sensors. Periodically check electrical connections for corrosion.
Water Witch, Inc. PO Box 710447 Santee, California 92072
1-800-654-4783 e-mail: info@WaterWitchInc.com www.WaterWitchInc.com
Model 257B
with optional buzzer
Model 257
wiring diagram shown with optional buzzer
Model #
Voltage
Max. Load
Category
Warranty
257
12Vdc
25A
Dual System (high water with aux. system)
7 years
257B
12Vdc
25A
Dual System (high water with aux. system)
7 years
257-24
24Vdc
20A
Dual System (high water with aux. system)
7 years
NOTE:
If large amounts of rain water can enter the bilge, it may dilute the normal, fresh or salt, water outside our
sensitivity window. Corrective action can be to switch pump on manually to remove diluted water or to
add minerals such as salt, baking soda, bilge cleaners, etc… NORMAL FRESH WATER HAS AMPLE
MINERAL CONTENT FOR PROPER OPERATION.
