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Thread: Inlet Hose length

  1. #1
    Join Date
    Feb 2014
    Location
    Livingston, MT
    Posts
    5

    Inlet Hose length

    Well, we've got a bit of a debate happening here in the brewhouse. One of the brewers thinks that a shorter an inlet hose (5 ft), the better it is for the pump as it is meant to push not pull. The other two of us think that it is perfectly fine to use a 20 ft hose as an inlet thus not needing to drag the pump around the brewhouse as much. To settle this, we've turned to you. Thoughts?
    Cheers
    Jon Berens
    Neptune's Brewery
    Livingston, MT
    Cheers
    Jon Berens
    Owner/ Head Brewer
    Neptune's Brewery
    Livingston, MT
    jon@neptunesbrewery.com

  2. #2
    Join Date
    Jan 2003
    Location
    Palau
    Posts
    2,021

    Sorry. He/she is right.

    Shorter is better. Bigger is better. Pumps ARE meant to push. You could do some research on your pump to see what your NPSH is. Besides, short hoses keep the floor less cluttered. Easier to clean and less of a trip hazard. Move the pump to where you need it.
    Phillip Kelm--Palau Brewing Company Manager--

  3. #3
    Join Date
    May 2012
    Location
    Livermore, CA
    Posts
    642
    The longer the hose, the more resistance to flow. Its not a huge deal on the output because you are putting the fluid under pressure, on the input you are putting the fluid under vacuum. This will reduce the boiling point and can lead to pump cavitation if the vacuum goes to high. This is why it is always recommended to have a larger inlet and as short of runs as possible. Also, if you are pumping carbonated beer, it can cause the carbonation to come out.

  4. #4
    Join Date
    Aug 2010
    Location
    Enterprise, Oregon
    Posts
    1,949
    Inlet--suction--hose for a pump should be the dia. of the pump inlet or larger, and as short as practical. Cavitation can result from a restricted inlet, and cavitation can eat a pump in a very short time.
    Timm Turrentine

    Brewerywright,
    Terminal Gravity Brewing,
    Enterprise. Oregon.

  5. #5
    Join Date
    Jul 2012
    Location
    Burnaby BC Canada
    Posts
    212

    Suction Side Hose Length

    The best rule of thumb is try to match the inlet size of the pump with the hose size on the suction hose, second, use the shortest possible length of hose. This is more to do with cavitation that can happen when the pump is being starved from suction hose that is to small in size (ID) and/or too long. Caviation is when you hear pinging noise coming from the pump, this will cause premature wear on the seals as well. The discharge hose can be longer and sometimes smaller than the outlet of the pump however I would always try to stay with matching hose size to port size. Hope this helps.

    Tony













    Quote Originally Posted by KingNeptune View Post
    Well, we've got a bit of a debate happening here in the brewhouse. One of the brewers thinks that a shorter an inlet hose (5 ft), the better it is for the pump as it is meant to push not pull. The other two of us think that it is perfectly fine to use a 20 ft hose as an inlet thus not needing to drag the pump around the brewhouse as much. To settle this, we've turned to you. Thoughts?
    Cheers
    Jon Berens
    Neptune's Brewery
    Livingston, MT
    Your CPE Systems Team!
    CPE Systems Inc.
    800-668-2268
    CPEsystems.com
    Thinkpumps.com
    sales@cpesystems.com

  6. #6
    Join Date
    Feb 2014
    Location
    Livingston, MT
    Posts
    5

    Thanks for the feedback

    Thanks for all of the feedback. Guess the smarty pants was right.
    Cheers
    Jon Berens
    Owner/ Head Brewer
    Neptune's Brewery
    Livingston, MT
    jon@neptunesbrewery.com

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