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  1. #378
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    Quote Originally Posted by itsiceman View Post
    My pump sounds like it's shifting gears now. I can watch the rate of pull down change in the app as the pressure drops. May just get a new cartridge. I kinda like the idea of going with the 10 cover on a 7 pump.
    My 5 is like that - I thought I saw some scoring on the cylinder wall of the pump you posted a pic of.


    Sent from my iPhone using Tapatalk

  2. #379
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    If the thread gets sticky can you take my user name out of the title.
    I don't want to be sticky lol

  3. Likes heatingman liked this post
  4. #380
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    Quote Originally Posted by heatingman View Post
    If they make this a sticky, does that mean no new posts? If so - nuts to that.


    Sent from my iPhone using Tapatalk
    sticky only means that the thread is locked to the top of the forum it is posted in.
    This forum requires that you wait 20 seconds between posts. Please try again in 50 seconds.

    Experience - knowing when to get the hell out of the way and plug your ears. "Don't be a sissy. Turn it on!"

    Poodle Head Mikey - "the world is well populated with the unknowing and the uncaring and the stupid."

  5. #381
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    No sorry...
    Not a sticky worthy thread

  6. #382
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    maroon lazyboy
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    If an extra 2 feet of 1 affects the vacuum that much, good grief what about 200 of 1 5/8 suction on a grocery circuit?

  7. #383
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    Quote Originally Posted by knave View Post
    If an extra 2 feet of 1 affects the vacuum that much, good grief what about 200 of 1 5/8 suction on a grocery circuit?
    Throw some more vacuum pumps on it.

    Sent from my Moto Z (2) using Tapatalk

  8. #384
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    Thread Starter
    Quote Originally Posted by knave View Post
    If an extra 2 feet of 1 affects the vacuum that much, good grief what about 200 of 1 5/8 suction on a grocery circuit?
    1 5/8 (ID being 1 1/2) wont be a problem

    Conductance speed at 1000 microns at 200 ft is 13.1 cfm

    If its 1 at 200 ft, then 2.6 cfm.




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  9. #385
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    Quote Originally Posted by heatingman View Post
    1 5/8 (ID being 1 1/2) wont be a problem

    Conductance speed at 1000 microns at 200 ft is 13.1 cfm

    If its 1 at 200 ft, then 2.6 cfm.




    Sent from my iPhone using Tapatalk
    Crap. I need bigger hoses, then.

    Sent from my Moto Z (2) using Tapatalk

  10. #386
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    I wonder how practical it would be to use rotolok fittings instead of unions on a copper, rather than PVC setup.

    that would eliminate potential oil breakdown of the piping and o-rings.

    Sent from my Moto Z (2) using Tapatalk

  11. #387
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    Quote Originally Posted by knave View Post
    If an extra 2 feet of 1 affects the vacuum that much, good grief what about 200 of 1 5/8 suction on a grocery circuit?
    knave it's the pressure and the way the gas moves.

    It's the 100/d formula

    There is no length component here.

    This is the pressure at which the molecules start to spread out and make more random movements causing a slow down.

    These would be true ID numbers

    3/8"~266
    1/2~200
    3/4~133
    1~100
    1.5~66

    So if you have a gauge at the end of your hose and one at the pump inlet you see a greater difference on the smaller line.

    Inside a system you really aren't going to be this low.

  12. #388
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    Youd be better off using the KF style flanges.

    They make brass braze together stuff also.

    Just search KF-16
    Or KF-25 fittings


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  13. #389
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    Quote Originally Posted by heatingman View Post


    4 minutes to 148 microns with just the appion hose.

    With just the micron gauge strait to the port, it gets to 50 microns in about 20 seconds, then will get to 25 microns at about a minute.




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    .

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