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Plastic Housings Crack and Leak
I am currently a home remodeler and, in my opinion, I have replaced far too many InSinkErator disposals that had cracked plastic housings. Failed plastic housings do sell replacement disposals so InSinkErator might have something going for them.
The mechanics, motor and grinder components in InSinkErators I have replaced seem to last well but the plastic housings certainly need some serious engineering attention.InSinkErator Evolution Compact 3/4 HP Household Garbage DisposerInSinkErator Badger 5 1/2 HP Food Waste Disposer
I am also a retired engineer who specialized in plastic injection molded parts (resin selection) and tooling to make the parts.
I hope InSinkErator reads the following.
My opinion is InSinkErator continues to ignore the root cause of the problem which is a poor choice of plastic material and/or improper tooling. Disposals must endure temperature cycles, vibration, and chemicals which means the proper plastic resin must be selected.
In molding the part, the tooling and processing must produce a part where the plastic resin is not stressed (shear forces, etc.) during injection and not have weak weld lines where the plastic rejoins in the mold after flowing around obstructions (i.e., the inlet hole/pipe from the dishwasher where the hose connects or the holes for the bolts that connect the top housing to the motor housing.
I just replaced a disposal I installed 3 ½ to 4 years ago. It was used in a second home that is used only 5 weeks a year; thus low usage.
In summary, I suggest a disposal that has stainless steel grinder housing. Today, I am replacing a Badger 9/Badger 900 (plastic housing model that cracked in 3 ½ to 4 years) with a InSinkErator Evolution Excel 1 HP Stainless Steel model. More expensive but hopefully worth the cost.
December 2012 · Tools and Home Improvement