Zoeller N98 - 1/2 HP Cast Iron Submersible Sump Pump w/ LevelGuard® Switch

It really depends on how much buildup you get. It should work but it may need cleaning periodically if it is really heavy. We've dealt with customers with iron in their water and they are happy if they only have to clean the switch every two months! Others may not have to clean it but once every year or so.

Actually, in a sewage application, even though there are no solids being pumped and you are only dealing with the effluent, the LevelGuard Z24803PTZ - Electronic Sewage & Effluent Pump Switch should be used due to the more acidic nature of the liquids being pumped.

While we do not have any specific answer to how the LevelGuard reacts to the buildup of various materials, it will handle a certain amount of buildup. Generally, this highly dependent upon what the build-up material consists of. For a non-porous, non conductive material such as peanut butter the thickness would be 4 to 5 mm. For a material that soaks up water as it sits it would be considerably lower. For more specific answers, you might contact LevelGuard tech support at (877) 342-3261.
As with any sump pump system, all manufacturers recommend that your system be inspected every 3-6 months to insure that they are operating correctly and that the basins are free and clean of any debris that may impede the operation of the pumps or float switch.

Typical installations will include the discharge PVC Sch40 pipe screwed into the pump discharge port and extending approximately 2-3 feet above the sump basin cover. At this point, you could attach the check valve and then complete your discharge configuration. This method would allow for an easier access point for you to service your pump.

Thank you for your interest in Sump Pumps Direct. The LevelGuard switch works based on Field Effect sensing technology that was developed by TouchSensors, Inc out of Wheaton, IL.
Field-Effect sensors are digital, solid-state electronic devices that can detect conductive materials such as water or the human touch. The sensor’s cell design uses an integrated circuit (IC) that switches its output state when the conductive target is sensed. A Field-Effect cell is comprised of three main elements, the IC, a unique sensing electrode geometry, and two tuning resistors. Moreover, Field-Effect requires no moving parts, floats, software, or any other mechanism to operate.
When 5 VDC is supplied to the sensor, a low power, invisible field is created. The field emanates directly through any protective dielectric barrier such as plastic or glass that may surround or cover the sensor. When a conductive object or material enters the field, the sensor detects the change and indicates an event has occurred with a corresponding output signal. The input stimulus to the field is typically water in most liquid level sensing applications, as is the case in TouchSensor’s™ LevelGuard Home Sump Pump Control product line.