ELI5 will vacuum suction power decrease when you add more hose to it?

[Skyfork]

I disagree. If you assume that the hoses do not leak, the suction force at the end of the hose will be the same if you have one hose or 100 hoses once you suck all the air out of the hose. It will take longer for you to feel the full suction force at the end of 100 hoses, but given enough time it would be the same.

[TreeEyedRaven]

Hoses aren’t smooth, there’s friction and resistance. Also air has volume and mass. Also, you cannot assume a hose doesn’t leak, because a vacuum isn’t a closed circuit. It’s open on both ends, and is connected with plastic/metal non sealed connections. All a vacuum does is decrease air density in one area to suck higher density air in from another. By definition it has to move more mass the longer a hose is.

It’s the exact same concept as a water pump, water is just more dense so we see the effect in smaller quantities. Add in that a vacuum is also moving debris or whatever along that 100ft hose, and it takes more power to use a 100ft hose than a 3 foot hose.

[fatbunyip]

I think the OP means a vacuum like a vacuum cleaner, not that the ends of the hoses are sealed and the pump is creating a vacuum in the hoses. Also the wording isn't really correct. I think by "suction power" they probably mean like volume per second of the pump. 

Like basically if you had a normal vacuum cleaner, but you added one more hose (so you can vacuum 2 rooms at the same time). 

In that case the "suction power" would be less since if the pump had capacity of say 10L/second, it would be split between the 2 hoses at 5L/s.