Vacuum hoses

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Old 04-30-20, 11:20 AM
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Vacuum hoses

This question is prompted by the post Join two central vac hoses by zhy987.
I didn't want to hi-jack his thread.

This may sound stupid but it has always bothered me. Why is it that all vac hoses slip over the extension piece, thereby introducing a "catch" of sorts in the direction of suction? I just made a nozzle for a small hand held and I made the piece to slip inside the mating piece to follow the flow of air. Am I missing something?

And yes today is a very lazy day and I have way too much time on my hands.
 
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Old 04-30-20, 03:10 PM
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Not quite following.
Typically the cuffs..... the end fitting for the hose.... screw over the hose.
Then attachments slide on over the cuff.

The end where the attachment is.... is not too critical but the end that connects to the wall/vacuum should be the same size as the connecting pipe.





 
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Old 04-30-20, 04:17 PM
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Here's what I mean. The main hose enters the vac machine (that's fine and makes s sense). Then the next attachment telescopes over, not into the other end. So what you have is debris entering the nozzle and is obstructed by the hose or fitting it enters. Very minor and just a shower thought. But if all attachments telescoped into instead of over the one before it then there would be no obstruction whatever.

Now this make little or no difference, but I have had larger types of debris such as wood shavings catch on the lip of the attachment and almost clog the hoses.

Now I suppose there is a reason, but my mind says, if sucking up anything provide the path of least resistance. So when I made my custom attachment it works as expected and nothing (including dust particles) ever get caught. Maybe its a fit thing. I don't know.

Now I question all of physics. LOL

 
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Old 05-01-20, 09:22 AM
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"Why is it that all vac hoses slip over the extension piece..."
They do it because it's easy and cheap.

Hoses are made with a smooth interior. That means in most cases there isn't an easy way to connect hoses using the outside corrugated/spriral wound exterior. So, slipping something inside the hose is easier to make a good fit and seal.
 
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Old 05-01-20, 09:27 AM
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OK, I guess that's as good an answer as any.
 
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