3 gallon wet/dry vacuum whining with crevice tool - normal?
I just purchased the 3 gallon wet/dry vac. I noticed that if I put the crevice tool on, the motor makes a very high-pitched whining sound. The high-pitched whining is not there without the crevice tool. I suspect this has to do with air flow restriction. However, is this normal or do I need to get a different unit?