Not all fluids are created equal and neither are the pumps that move them.  The construction of a pump determines on what is transported through the piping and at what stage in the company’s process.  Non-clog solids pumps are also known as solid handling pumps.

The name “Non-clog” is a misnomer in the industry because all pumps clog.  It’s inevitable.  Throw a rag in any pump and it is likely to get tangled up in the impeller somehow.  Beach resorts are constantly battling with towels, rags, t-shirts, and more getting stuck in their piping system one way or another.  Their maintenance teams are probably on call to get knee deep in their piping to remove whatever guests decide to throw down the toilet.


Non-clog solids pumps are centrifugal end pump.  They put together a volute type casing and impeller with large clearances on the inside that are designed to pass solids that are normally found in wastewater.  Some designs have open impellers called vortex or screw that handle larger solids.  These special types of Non-Clog Solids pumps sacrifice efficiency to push waste through the system appropriately.

These types of pumps are normally used for wastewater applications, raw-water intake pump stations, flood control, and dewatering.  Anywhere water with sediment is to be moved, a non-clog solids pump can be found.

Some non-clog solids pumps are not submersible sewage pumps.  Though they are very similar, non-clog solids pumps are not meant to be submerged.  They are usually installed in a dry-pit that is next to a wet-pump where the sump is located.  A submersible pump like the EBARA submersible sewage pump found right in the wet-pit.


Water comes from somewhere.  Most of the time it has to get through the elements before it gets to their final destination.  Non-clog solids pumps handle water when they are filled with some sort of sediment.  In a dewatering situation, there are all kinds of things coming off of the construction site that could end up in drinking water.  Non-clog solids pump moves the wastewater from one end to another.  Due to the way the pump is manufactured, the sediments are not likely to clog the pump.  The wastewater is then taken to another part of the piping system where it is strained and the clean water moves through the rest of the system.

A non-clog solids pump system has an open impeller.  Unlike many other kinds of pumps, it allows larger objects to pass through. The 330 Series NCH Horizontal two vanes non-clog pump from American Marsh allows for rock as large as seven inches in diameter. This also means the pump is used in a wide range of applications including drilled muds and other industrial fluids.

A two vane impeller creates a cutting style that terminates the eye of the sediment and shreds stringy material that will eliminate clogging.  Sewage tends to contain this type of waste.  It is really unpredictable what people flush down the toilet.  Think about the signs in the bathroom that say to not flush a dirty diaper.  People really do it and those diapers do get stuck.  Think twice before you flush.

The pump is usually built with a wear plate that will get hit with a few big pieces of rock and other sediments over time.  It is meant to be worn a little bit for a replacement.  With all of the elements out there, it will only be time before some part is replaced.

Always review the pump’s specifications before putting it in your piping system.  An impeller with a smaller opening is used for locations with small rocks or sewage.


People really throw all kinds of waste into water, down the toilet, and in our waterways.  Companies sometimes do not compensate for what is really going through their pumps.  Many organizations do not get the right non-clog solids pump for the job.  The real disadvantage is not doing homework before purchasing the pump.  Having the right tools for the job will assist in relieving future headaches.  Because these organizations buy the wrong size non-clog solids pump, their pipes eventually get clogged, causing expensive repairs.

As mentioned before, every pump gets clogged.

Also, pumps that are meant for larger pieces of sediment do perform much slower.  The larger the diameter of the opening means less friction.  The pump needs to work harder to keep everything moving.  The sludge will slow down the rest of the liquid causing less efficiency.  Consider increasing the horsepower to push through the liquid.  This will raise the electricity bill but it will keep the pump moving.


The most common type of non-clog solids pumps is a belt-drive like the one found at Grundfos are quite large and used in a dry put.  They work at very low speeds.  These non-clog solids pumps are great for lift stations, treatment plants and other industrial applications where the size of the sediment could vary depending on their external settings and whatever the company plans to bring into their plant.

A vertical pump is difficult to handle as it makes removal more complicated.  The main benefit is that they do not take up much space.  Because the fluid is going from the top to the bottom, there is less likely to be a clog due to gravity.  If the company does decide to put one of these slim beauties in their operation, they will have to opt for flood insurance because the vertical non-clog solids pump is more likely to flood than the horizontal type.

Non-clog solids pumps are great for companies are moving fluid with all kinds of rocks, sewage, or whatever strange object that seems to end up in the water.  Before moving forward with this kind of pump, always look at the specifications and take into consideration the goal of the organization.  If there is wastewater involved, consider a two vane system that will break up the sediment before going through the rest of your piping.

Contact ESP-Richmond for more information on the best non-clog solids pump for your business.