PlumbingSupply.com logo
The Leading Online Plumbing Supplier Since 1995
Home | Great Customer Reviews | View Cart
Our motto: "under-promise...over-perform"
Product Search:

Largest Inventory - Best Service - Lowest Prices
Find your plumbing supplies starting with:   A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


Simple, straightforward and low shipping rates for these pump switches.


Outdoor Electronic Hi-Lo Pump Switch


A reliable, easy to install electronic Hi-Lo pump switch offers many benefits. This minor investment helps protect your property from water damage, and lets you determine where the pump turns on and where it turns off. When you need an outdoor electronic pump switch, check PlumbingSupply.com - your source for these and many more pumps, alarms, pump switches and more.

Outdoor Hi-Lo Sump Controller Switch

These Outdoor Hi-Lo Pump Switches are "electronic float" switches that are designed to work in sump pits that collect ground water from around your home's foundation. They are particularly useful when the sump pit is very large and may take more than 90 seconds to empty. The real advantage of the Outdoor Hi-Lo Pump Switch is that it lets you accurately set where the pump turns on, and where it turns off. Unlike traditional float switches, the outdoor Hi-Lo pump switch has no moving parts that can seize up or get wedged between the pump and the wall of the pit and prevent the pump from running, or cause it to run continuously and burn out. This makes the outdoor Hi-Lo pump switch many times more reliable than float switches and, because it's electronic, it has features that just aren't available in mechanical switches, such as the alarms that are described below. This Outdoor Hi-Lo SumpController Switch works with most brands of pumps like: Zoeller, Grundfos, Little Giant, and Liberty.

This outdoor Hi-Lo sump controller features:
  • Easy to install, doesn't require any changes to your plumbing
  • Can be installed inside or outside
  • Comes with two sensors and a control module
  • The setting of the sensors determine when the control module turns the pump on, and when it turns it off.
  • Lets you accurately set where the pump turns on, and where it turns off
  • Fits in narrow sump pits, where most floats are hard to fit
  • Ideal for a second pump when space in the pit becomes very tight
  • No tools required - makes for easy installation
  • No mechanical parts to wear out
  • Plugs into standard three-prong electrical outlet with GFI
  • 5' long power cord
  • 120VAC, 14amp (max current)
  • 12 ft sensor cable length
  • Relay cycles pump on/off - more information
  • Relay life expectancy: 100,000 - 1,000,000 cycles
  • Click here for detailed installation instructions
Outdoor Hi-Lo Pump Switch
Outdoor Hi-Lo Electronic Sump Controller - for pumps up to 14 amps $135.33

- Or -View Button

We also offer a hi-lo pump switch for indoor installations.



How The Outdoor Hi-Lo Pump Switch Works
Outdoor Hi-Lo Pump Switch - how it works
The setting of the sensors determine when the control module turns the pump on, and when it turns it off.
The sequence below outlines the operation of this switch as follows:
  1. When the water is below both sensors, the pump is off
  2. The pump is off when the water is above the lower sensor, but hasn't reached the upper sensor
  3. When the water reaches the upper sensor, the pump is turned on
  4. The pump stays on while the water is between the sensors
  5. The pump is turned off when the water drops below the lower sensor



Alarms and Indicators
The Outdoor Hi-Lo SumpController Switch has a number of built in alarms that warn of problems with the pump or discharge plumbing. The available alarms are described in the table below. Note that the alarms can be disabled by following the steps below:
  1. Unplug pump from control module
  2. Lift top sensor out of water
  3. Unplug control module from 120 VAC outlet. Wait 10 seconds
  4. Plug control module back into outlet. Wait 10 seconds
  5. Unplug control module from 120 VAC outlet. Wait 10 seconds
  6. Plug control module back into outlet. Wait 10 seconds
  7. Plug pump back into control module
  8. Place top sensor back into water
Alarm/Indicator Description Possible Causes
2 Beeps Can't turn pump on
  • Pump not plugged in
  • Float piggyback plug not disconnected
  • Internal float switch not secured in "on" position
3 Beeps High Level Alarm
  • Pump can't keep up with water coming in
  • Discharge plumbing blocked
  • Debris on sensor
Steady Slow Beep Motor current above normal
  • Pump is beginning to fail
Steady Fast Beep Motor current too high
  • Pump failure immanent
Steady Red LED Pump off, no water detected  
Flashing Red LED Pump off, lower sensor detecting water  
Steady Green LED Pump on, water detected by both sensors
  • If this condition exists for more than 30 seconds the high-level alarm will be sounded
Flashing Green LED Pump on, water below upper sensor  



Things To Keep In Mind
Sump Diagram

  • The "piggyback plug" attached to the mechanical float switch cannot be used with the Outdoor Hi-Lo Sump Controller. It must be disconnected and remain disconnected.
  • If your sump pump has an internal float switch wiring, i.e. doesn't have a "piggyback plug," then you must secure the float up as if the pit were full so that its internal switch is always closed and the pump enabled.
  • The sensors shouldn't touch anything else in the pit, like the wall, each other, the discharge pipe, pump, etc. If they do, the Outdoor Hi-Lo Sump Controller might be confused and think it is time to turn the pump on, or fail to turn it off.
  • The Outdoor Hi-Lo Sump Controller works with any size pump, up to a maximum of 14 amps.

VERY IMPORTANT: During installation it is very important both of the sensors be installed so that they are not touching water before power is applied to the controller. Manually operate the pump to drain the sump down if necessary to accomplish this. Place the sensors in the sump, one at the desired low water level and the other one at the desired high water level. Once the controller is plugged into a power source, the sensors will be calibrated by the controller as the water level rises and touches first the low sensor and then the high sensor.




Note: ALL brands of man-made devices WILL eventually fail.
These electronic pump switches are great devices, but they are not the "end all" solution to help prevent water damage.



Related Items & Accessories:
Sewage Ejector Packages

Aerator Fountain Pump

pumps index

Portable Water Detection Alarm


Frequently Asked Questions

Q. "What is the life expectancy of the relay?"
A. The electrical life expectancy of general purpose and power relays is generally rated to be 100,000 operations minimum, while mechanical life expectancy may be one million, 10, or even 100 million operations. The reason electrical life is rated so low compared with mechanical life is because contact life is application dependent. The electrical rating applies to contacts switching their rated loads. When a set of contacts switches a load of less than rated value, contact life may be significantly greater. For example, 25 amp, 240V AC, 80% P.F. contacts may be expected to switch such a 25 amp load in excess of 100,000 operations. If these contacts are used to switch, say, a 5 amp, 120V AC resistive load, however, life may be in excess of a million operations.

Q. "How far apart can the outdoor Hi-Lo sump controller 'sensors' be placed vertically apart from each other?"
A. The location of the sensors is only limited by the length cables (12ft), but other than that, the sensors have no other restrictions as to how close or how far apart they are placed vertically or horizontally. When water is above both the sensors then the pump will be off. When water is below both sensors the pump will be on.

Q. "Do you offer a pump switch that operates opposite of this outdoor Hi-Lo Sump Controller switch?"
A. We offer the Tank Level Controller switch which works opposite of the Hi-Lo Sump Controller switch. The purpose of the Tank Level Controller is to make sure your tank does not run dry. This item is designed to be off when both sensors are contacting water, and as soon as both sensors do not contact water, the pump turns on and fills the pit/tank until the water level reaches the top sensor.

Q. "We are very happy with this Outdoor Electronic Hi-Lo Pump Switch. But, is there something available in case we have an electrical power failure?"
A. We offer a water powered back up sump pump made by Zoeller and also one made by Liberty Pumps. We also offer some 12 volt battery operated sump pumps. The Little Giant battery backup Emergency Sump Pump System is very reliable and we have not heard of any problems with them. We also offer a Failed Circuit Alarm which will signal an alarm when a circuit has failed.

Q. "How do you secure the Hi-Lo Sump Pump Controller 'sensors' so they will not touch anything else in the pit?"
A. One suggestion: Straighten a piece of small diameter copper tubing (3/16" or 1/4") approximately 4"-8" long. Form the copper tubing to make a tight diameter half circle at one end which will be the top. Form a loop at the other end or bottom. Now make a 90 degree bend in the middle. The straight portion of the tubing with the half circle at the top can be attached to the discharge pipe using zip ties. The half circle will keep the tubing from slipping down through the zip ties. The sensor can then be attached to the loop sticking out and away from the discharge pipe. Make one for each sensor.
suggestion for securing sensor to pipe
Suggested Shape
click here for larger image



return to top ↑

We hope that we have helped you on this page with pump switches,
and thank you for helping to make PlumbingSupply.com the most famous Internet plumbing supplier.


One of many great quotes you'll find on our web site:
I have never killed a man, but I have read many obituaries with great pleasure.
- Clarence Darrow



Is there something else that you are looking for?

Enter search terms:

OR - find plumbing supplies starting with: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z



Easy payment methods


Copyright© 1995-2012 All Rights Reserved. PlumbingSupply.com