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Thread: Hose Length

  1. #1
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    Hose Length

    From what I've been taught....most manufacturers recommend adding 3oz of refrigerant for every 5 foot of piping added to a system.

    Would using 5 feet of hoses on your manifold gauges not screw up pressure readings since technically you added 5 feet to the system making it short 3oz of refrigerant?

  2. #2
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    Quote Originally Posted by AStudent
    From what I've been taught....most manufacturers recommend adding 3oz of refrigerant for every 5 foot of piping added to a system.

    Would using 5 feet of hoses on your manifold gauges not screw up pressure readings since technically you added 5 feet to the system making it short 3oz of refrigerant?
    Not if you remove the hoses.

    You've then removed the excess "piping"

  3. #3
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    Sorry guess I should specify...would it not screw up the pressure readings on your manifold gauges while you are testing a system?

    Or is it not enough of a change to matter?

  4. #4
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    Quote Originally Posted by AStudent
    Sorry guess I should specify...would it not screw up the pressure readings on your manifold gauges while you are testing a system?

    Or is it not enough of a change to matter?
    On a small, critically charged system, it can.

  5. #5
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    Quote Originally Posted by jpsmith1cm View Post
    On a small, critically charged system, it can.
    This is why we never hook up to critically charged systems unless your positive you have a refer issue. Also probably why alot of critical system don't have access ports...

  6. #6
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    Quote Originally Posted by mjm88 View Post
    This is why we never hook up to critically charged systems unless your positive you have a refer issue.
    Exactly

    Sent from my HTC Sensation 4G using Tapatalk

  7. #7
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    On critical charged systems i don't use hoses to check pressures.
    Also it depends on how one sets there scale when charging.

  8. #8
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    [QUOTE=AStudent;12608871] manufacturers recommend adding 3oz of refrigerant for every 5 foot of piping added to a system.

    Are you talking 5' of liquid line add 3oz. ?

  9. #9
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    [QUOTE=VTP99;12610151]
    Quote Originally Posted by AStudent View Post
    manufacturers recommend adding 3oz of refrigerant for every 5 foot of piping added to a system.

    Are you talking 5' of liquid line add 3oz. ?
    I believe it should specify in the installation instructions what the manufacturers recommended tubing length is, and how much refrigerant to add per so many feet of tubing added past that.

  10. #10
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    That should be total system length not just the liquid line.

  11. #11
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    Quote Originally Posted by VTP99 View Post
    On critical charged systems i don't use hoses to check pressures.
    Also it depends on how one sets there scale when charging.
    What do you use?

    Sent from my HTC Sensation 4G using Tapatalk

  12. #12
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    Just the gauges with fittings.
    You need to put the phone down and get back to work!

  13. #13
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    Quote Originally Posted by jnsrose View Post
    Just the gauges with fittings.

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