Probably not the type of answer you’re looking for but: When I was a kid I worked for a guy who owned a car detailing company for like 20+ years. He had his shopvacs (which were used on a near constant basis) all setup so that there were two canisters. Meaning the hose where you are actually vacuuming stuff up with went back to an empty canister with no shopvac/engine on it, then from there another hose would go out the back, and that one was connected to a canister that DID have your shopvac/engine. So an empty canister in between. He said it extended the life of his vacuums by about x3 since the majority of the materials stayed in that in between canister and it was much easier on the engine and whatnot. More on reddit.com

Let me let you in on a little secret. if it is an electric vacuum that plugs into the wall and runs continuously anything over 2.41HP is a lie and here is why. HP is a measure of power and in electric motors it is calculated by the power of the motor which is measured in watts. Watts = Volts*Amps and here in Canada our wall outlets output 120 Volts(more like 110-115) and our breakers will flip off if more than 15 Amps are being used (unless you are using a high power outlet like the one behind your stove which will allow more current draw). so at most the max power you can get from your wall outlet is 120volts*15amps or 1800 Watts. 745.7 Watts = approx 1 hp so your wall outlet can only create upto 2.41HP. these company's can get away with claiming their vacuum is 4hp because that is what the motor is rated for. but you will never ever ever get that much power from the motor because physics. It is even more of a lie because if the vacuum just used as much power it could they would flip your breaker every time you turn them on so they are current limited to prevent this. More on reddit.com

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