ChicagoDiscus.com     Cafepress Store

Results 1 to 8 of 8

Thread: Question about Jehmco linear piston air pumps

  1. #1
    Registered Member smsimcik's Avatar
    Join Date
    Feb 2008
    Location
    Waco, Tx
    Posts
    488
    Real Name
    Steve

    Default Question about Jehmco linear piston air pumps

    I just received a linear piston air pump from Jehmco today. I've never used a piston pump before. It was to replace a Jehmco diaphragm pump that had worn out. I was under the impression that the linear piston pumps were virtually silent compared to diaphragm pumps. This is the smallest one they sell but it is not that quiet at all. I can hear it humming over the sound of 22 sponge filters bubbling. And no it's not back pressure. It hums like this even when it's not connected to the airlines. It's even louder than the diaphragm pump it was replacing.

    For anyone who uses these piston pumps, what is your experience? Are they really practically silent or is there something wrong with this one they send me?

  2. #2
    Homesteader RogueDiscus's Avatar
    Join Date
    Jun 2009
    Location
    OR
    Posts
    3,130
    Real Name
    Steve

    Default Re: Question about Jehmco linear piston air pumps

    I have one, I forget the model, but I don't think it's their smallest. It's very quiet, at least compared to the diaphragms I used to have. Makes me wonder what you have it sitting on, in case that matters.

    I think I have their LPH 45.

  3. #3
    Moderator Team LizStreithorst's Avatar
    Join Date
    Jan 2005
    Location
    Moselle, MS
    Posts
    13,066

    Default Re: Question about Jehmco linear piston air pumps

    Call Jehmco and tell them about it. They will replace the pump for you if you got a bad one. IME they are silent and last forever. Mine has been going for 12 years and it is producing the same amount of air as it was on day one.
    Mama Bear

  4. #4
    Moderator Team LizStreithorst's Avatar
    Join Date
    Jan 2005
    Location
    Moselle, MS
    Posts
    13,066

    Default Re: Question about Jehmco linear piston air pumps

    I have the same one as you, Steve.
    Mama Bear

  5. #5
    Registered Member smsimcik's Avatar
    Join Date
    Feb 2008
    Location
    Waco, Tx
    Posts
    488
    Real Name
    Steve

    Default Re: Question about Jehmco linear piston air pumps

    Mine is the LPH26. It's sitting on top of a bench covered with 1/2" foam board. I don't think what it's sitting on is the issue. It sounded the same even when it was sitting on a carpeted floor.
    I intended calling Jehmco in the morning but wanted to get feedback from people who have been running them. It moves air just fine. I was just disappointed it was not as quiet as I had hoped. I like a relatively quiet fish room. At least I don't want to listen to a pump humming.

  6. #6
    Registered Member seanyuki's Avatar
    Join Date
    Jun 2006
    Location
    B.C. Canada
    Posts
    5,338
    Real Name
    Francis

    Default Re: Question about Jehmco linear piston air pumps

    Got this one Medo linear Air pump LH45 with a 20 outlet air manifold.DSCF1422_zps146277dc.jpg
    Grasshopper
    Francis

  7. #7
    Registered Member smsimcik's Avatar
    Join Date
    Feb 2008
    Location
    Waco, Tx
    Posts
    488
    Real Name
    Steve

    Default Re: Question about Jehmco linear piston air pumps

    Quote Originally Posted by seanyuki View Post
    Got this one Medo linear Air pump LH45 with a 20 outlet air manifold.DSCF1422_zps146277dc.jpg
    Yeah, but is it quiet?

  8. #8
    Registered Member seanyuki's Avatar
    Join Date
    Jun 2006
    Location
    B.C. Canada
    Posts
    5,338
    Real Name
    Francis

    Default Re: Question about Jehmco linear piston air pumps

    Extremely quiet.....The pumps operate at a very low noise level, about that of a light ballast, as there are no crankshafts, connecting rods or ball bearings to create additional noise.
    http://www.medo-water.com/linear_piston.php
    Last edited by seanyuki; 03-31-2020 at 09:11 PM.
    Grasshopper
    Francis

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Cafepress