Grinder Waste Water Sewage Pumps

First Quality ~ First Time

Apparatus Repair & Engineering, Inc.

A.R.&E. is the Premier Electric Motor Sales, Service, and Repair facility in the quad-state region of Maryland, Pennsylvania, West Virginia, and Virginia. This business began in 1927, and we are proud to continue the efforts of the founding partners who have served the local Commercial and Industrial markets over these many years. Times have changed in the many years since the inception of this business, and A.R.&E. is growing and changing with the times. Today the use of AI, computers, and factory automation is necessary for businesses to remain competitive in the global market, and A.R.&E. is here to assist with those challenges. And we promise our work will be... First Quality ~ First Time.

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This is an example of an automated oil dispensing tank and pump system that was totally designed and built by A.R.&E. for a local manufacturer...

Generator Install

Here's what an emergency generator installation can look like when A.R.&E. is involved...


Sometimes it's necessary to "buildup" a metal surface that's been damaged by wear. Metalizing is one method of doing just that...


Total rewind of a customer's electric motor. Sometimes, though no one's fault, an electric motor "burns up." That's when our rewind department shines. Here's the technician is rewinding this small motor, and in a couple of hours it'll be "as good as, (or better than) new"...


Turkey and dressing is the classic dinner at this time of year. Thanksgiving Day is an annual national holiday in the United States and Canada celebrating the harvest and other blessings of the past year. The American tradition has us attempting to recreate the dinner between the Pilgrims and the Native Americans. However you celebrate, we at Apparatus Repair & Engineering, Inc. want to wish you all a Safe, Blessed and Happy Thanksgiving.

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What are Waste Water Grinder Pumps

"Grinder" pumps are used both in residential and small industrial/commercial system. Waste water pumps are basically a "centrifugal" pump except that in the waste water systems, the impeller is more of an "open" impeller. This allows the impeller to handle larger "solids" than a "closed" impeller in a fresh water centrifugal pump and helps to minimize clogging. In addition, the waste water pump will have a larger inlet and outlet for the same reason... size of solids being passed.


Well, that's where the "Grinder" pump comes into the picture. A grinder pump is a type of "Submersible" pump as you can see from the left photo above. This type of pump has a set of "grinding" (or cutting) blades (one type shown in the right hand photo above), that are designed to "cut up" the solids that are sucked into the inlet of the pump, like a toothbrush, or a Lego toy, or a wash cloth, etc. These cutters are attached to the extreme end of the shaft, so that any solid gets to them before it gets to the impeller and causes a clog.  In some cases, a standard waste water pump with an open impeller and a large enough inlet and outlet may very well "pass through" these smaller items. But something like a towel, may not be so easy.

 Grinder pumps may very well do the job, if the debris isn't too difficult to cut up. But things like clothing, canvas, metals, glass, etc., those won't work well with this pump. Keep in mind too, that the "cutter blades" do get dull if they are asked to cut up material on a continuous basis. That means a maintenance expense AND downtime. If you can't afford downtime of the waste stream, you need to have a spare pump sitting around.

So Grinder pumps have a place in some waste water systems, but not all. Give the folks at A.R.&E. a call to discuss your application and we'll do our best to help you make the right decision.