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 #HC6100

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, and Little Giant,.

Outdoor Hi-Lo Pump Switch HC6100
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 - view sensor placement below
  • 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 - information about life expectancy
  • Relay life expectancy: 100,000 - 1,000,000 cycles
  • Visual LED light on the controller indicates when pump is on or off
  • View detailed installation instructions

Outdoor Hi-Lo Electronic Sump Controller = $150.11

- OR - View Cart

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



Outdoor Hi-Lo Sump Controller Switch #HC6100

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. It does not make any difference which sensor is the upper or the lower sensor. Either one can be put in either position. 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

Trouble Shooting Chart


Condition Current Situation Corrective Action
Solid Red LED Pump is off. Neither sensor is detecting water None. Controller and pump are functioning properly
Flashing Red LED Pump is off. Only one sensor is detecting water None. Controller and pump are functioning properly
Solid Green LED Pump is running. Both sensors are detecting water None. Controller and pump are functioning properly
Flashing Green LED Pump is running. Only one sensor is detecting water None. Controller and pump are functioning properly
Pump won't start
  • Sensor not detecting water
  • Faulty pump
  • Pump not plugged in
  • Add ground wire
  • Plug pump directly into 120v AC outlet and confirm proper pump operation. Replace if defective
  • Check pump for proper plug-in into controller
  • Check mechanical float switch (if present on pump) must be secured in "on" position
  • Confirm pump is disconnected from piggy-back plug (if present)
Pump won't turn OFF Sensor dirty or shorted to discharge pipe or side of pit by floating debris
Pump turns OFF too soon Lower sensor set to high in pit Move lower sensor down. Extremely important: the tip of the lower sensor must be above the minimum pump-down depth of the pump, otherwise it may not pump below the sensors tip, keeping the pump running indefinitely
Pump cycles too often Sensors set too close together Increase separation distance between sensors



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.

Special Sensor Installation Instructions

When the HC6100 Tank Level Controller is going to be used in a tank or pond that has high mineral or iron content, the sensors must be mounted in a specific manner so they won't be affected by the water's content and will reliably detect water levels for many years of trouble free operation.

Step 1
To install the sensors properly for this type of water environment, you will need a few additional items:
  • 1/2" PVC pipe (available at local hardware store). The length of pipe should be suitable for your application.
    Length of pipe can be determined by how deep your tank is and how far apart you want your sensors to be placed.
    Read how the position of the sensors determine water level.

  • 1 Each 1/2" PVC cross = $1.48 +

  • 1 Each #20 Stainless steel hose clamp = $1.66 + - secures 1/2" cross to 1/2" PVC pipe

  • Choose only 1 Each of the following depending on the size for your discharge pipe size

  • 1 Each #32 Stainless steel hose clamp = $1.76 + - secures 1/2" cross to 1-1/2" discharge pipe

  • 1 Each #40 Stainless steel hose clamp = $1.92 + - secures 1/2" cross to 2" discharge pipe
Step 2
In this step you will need to pass the #20 stainless steel clamp through one side of the 1/2" PVC cross and pass the #40 stainless steel clamp through the other side of the 1/2" PVC cross. If your discharge pipe is 1-1/2" PVC or ABS then you will need to use a #32 stainless steel hose clamp instead of the #40 stainless hose clamp. This step is in preparation for the following steps. Go on to Step 3
Step 3
Strap the two sensors to the 1/2" PVC pipe using the tie-wraps included with the controller. Position one sensor to set the level where the pump is to turn on. Position the other sensor where the pump is to turn off. It makes no difference which sensor is placed in the high or low position. They can be placed as far apart, or as close together, as your application requires. Please note: The tip of the lower sensor needs to be above the minimum pump down depth of the pump. If placed too low, it may cause the pump to not pump the water below the sensor's tip, which can keep the pump running indefinitely.


Step 4
Position the 1/2" PVC pipe between the PVC cross with the #20 stainless steel hose clamp. Tighten the hose clamp until the 1/2" PVC pipe is held snuggly against the PVC cross.


Step 5
Position the PVC cross to the desired height of the sensors in the pit. Wrap the #40 stainless hose clamp (or #32 if 1-1/2" discharge pipe is used) around the discharge pipe. Tighten the stainless steel clamp until the PVC cross is held firmly in place against the discharge pipe.

Installing the sensors in this manner will help prevent the buildup of minerals and iron deposits from interfering with the proper operation of the sensors, which can cause the pump to run continuously after the water has been fully pumped out.

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



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. "I just installed this Outdoor Electronic Hi-Lo Pump Switch and my pump won't turn on. Is my switch defective?"
A. Your switch is most likely not defective. The water in the pit needs to have a good ground for the sensors to work properly. Normally the pump provides enough of a ground for the sensors to operate correctly, however, occasionally it won't. When this happens a ground wire will need to be added to the pit. The ground wire is simply a length of copper wire with a short section of insulation removed from both ends. One end is placed into the pit so the bare tip of the wire is located below the tip of the lowest sensor. The ground wire can be zip tied in place to the drain pipe. Having the ground wire located below the lowest sensor ensures the water will be grounded by the time it reaches the sensor. The top side of the ground wire needs to be secured to something with a good earth ground. It can be secured to a copper water pipe or metal electrical conduit by using a ground clamp available from your local hardware store. Or the ground wire can be secured to the center screw of an electrical outlet box using as suitable crimp-on eyelet connector, also available at your local hardware store.

ground clamp
ground clamp
crimp on eyelet connection
eyelet connector

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.


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