Re: linear piston pumps

["William Ruyle" <forest at copper_net>]

Thanks Lee, for your comments and Dennis, I'm going to
give it some thought on the Rena 400 and 3/4 inch PVC.
Great idea, since my total # tanks will be maybe 20, with several tanks
being 33 gallon long (roughly 12"x12"x48"). I'm going to try bigger tanks
and see how it goes. Twin Oaks in Tennessee offers the 33L gallon for
$40--pretty reasonable.
Bill
forest at copper_net

----- Original Message -----
From: "Dennis W Heltzel" <dheltzel at ccil_org>
To: <killietalk at aka_org>
Sent: Saturday, July 20, 2002 6:06 PM
Subject: Re: linear piston pumps


> I recently bought the smallest sized Jehmco pump (26 watts). I mostly
> wanted to save electricity and figured it would be adequate for my needs.
> So far is has plenty of air to drive airstones and sponge filters in:
>
> 14 - 10 gallon
> 6 - 15 gallon
> 5 - 20 longs
> 1 - BS hatchery
>
> I leave one of the extra valves pretty much wide open to bleed off the
> excess air, and some of the other valves are obviously leaking (I hear the
> hiss). I'm not sure I could run twice as many tanks, but I'm sure I
> could add another 10 or so without any problem. Notice, all these tanks
> are only 12 inches deep, and I think that's why I have excess air.
>
> If you are not sure you need even this much air, I'd suggest you get a
> regular pump like the Rena 400 several people have raved about, and build
> your air distribution system with 3/4 inch PVC and quality valves. If you
> find that the pump is not powerful enough to drive all your tanks, then
> get the linear pump from Jehmco. I think you'll be amazed at how much air
> one of those Rena pumps can produce if the distribution system is really
> good. Pumping air through airline tubing requires a lot more from the pump
> than if it goes via PVC pipe. I try to make the final runs to the tanks
> as short as possible.
>
> Dennis
>
>  On Sat, 20 Jul 2002, William Ruyle wrote:
> > I would like some info from end-users on those Japanese pumps Jehmco
sells. What's
> > there longevity, how much upkeep, and what's the minimum # of tanks to
even consider their smallest model. Thanks in
> > advance for any advice given.
> > Bill
>
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