In order to grind up tough foods, a garbage disposal needs a powerful motor. They are measured in RPMS (revolutions per minute) and horsepower. A good motor will have between 2600-2800 RPMs, and ¾-1.0 horsepower. Extremely powerful motors can have as many as 3600 RPMs. On the lower end of the spectrum, motors start at ½-HP, which is still strong enough to grind up most food. There are also different types of motors, like permanent magnet motors and induction motors. With permanent magnet motors, the magnet is embedded in the rotor, which is the part of the electric motor that moves and generates torque. Permanent magnet motors are known for their durability. An induction motor works when the electric current in the rotor (this current creates torque) is generated by the magnetics from the stator. Permanent magnet motors are similar to induction motors, though permanent magnet motors are more consistent.
The grinding system of a garbage disposal is what is responsible for breaking down all the food. It should be built to last and have good torque to handle tough foods like fruit cores, little bones, and pits. A good material to look for is glass-filled nylon, since it isn’t subject to corrosion. Stainless or galvanized steel parts are also good. Many garbage disposals are equipped with special grinding technology, like the MultiGrind, which consists of three grind stages. These include a GrindShear Ring and Undercutter Disk that turn food to mush so it slides into the sewer system. Grinding systems also typically include a splash guard, so cleaning up after a grind is easy.
Garbage disposals are not all the same size; they have different feed systems and feed capacities. To use a batch-feed model, you pack trash into the chamber and then use the stopper to get the blades grinding. You would use this feed system if you don’t have a wall switch for your disposal. The most popular feed system is the continuous-feed, which means you operate the disposal by turning on cold water, turning the disposal on, and pushing in food. A good-sized chamber will hold about 40-ounces of food waste, while smaller ones can be less than 30-ounces.
Setting up a garbage disposal is easier than it’s ever been with more compact and fast-install designs. Snap and Lock mounts (an InSinkErator innovation) are especially convenient because they can replace almost all disposals, even ones that aren’t InSinkErators. You just twist off your old disposal and twist on the new one. All the parts are included. All disposals are sized for standard septic tanks, and usually include the necessary power cord.
Low noise level
Garbage disposals usually have some kind of technology that makes the disposal fairly quiet. Materials like insulated stainless steel reduce noise, as do features like anti-vibration sink mounts and anti-vibration tailpipes. Silencer Technology (a Waste King feature) uses the same material that music studios do when they soundproof the room. With such low noise level, it’s easy to have a conversation in the kitchen while running the garbage disposal, and you won’t scare sensitive pets or infants.