>Marcin Piekarski <piekars@in*.co*.pl*> wrote:
    >

    >Hello group.
    >This time I'm completing next set of my doubles, previous one that I
own
    >was pre assembled in factory. This time I've got such a question.
    >I want to pair two 15 or 18 liters tanks, (ca.110 and 130 cf) but
    >standard manifold from Scubapro - which is the easiest to buy in
Poland,
    >has only about 18-19 cm space between tank axes. It means that I can
use
    >it on tanks that are no bigger than 18 cm in diameter, each.
    >
    >Standard 15 liters tank has 20,3 mm and 18 liters - ca. 213 mm. It
means
    >that this two types are excluded.
    >
    >Are you using bigger manifolds, from other manufacturers, with this
kind
    >of tanks or are you buying thinner - longer tanks that would fit this
    >particular manifold.
    >
    >Marcin
    For those types of tanks you should use a so-called "true 8.5 in
manifold", as the new Dive Rite and Halcyon. Go to the archives and run a
search using "manifold". I just received this monday a Halcyon manifold, and
they look pretty rugged to me. Besides, they already come in DIN 300, that
is preferable than a 200 bar manifold. I don't think Scubapro have those.
    Order one from Halcyon, that's my suggestion.
    Fabricio
    PS. Here's a post from Dell  Motes.  It is very informative.
    -----Mensagem original-----
    De: Dell Motes <dell@di*.co*>
    Para: techdiver <techdiver@aquanaut.com>
    Data: Sexta-feira, 28 de Abril de 2000 19:00
    Assunto: Manifold misinformation
    The old Dive Rite and Sea Elite manifolds were one in the same, made in
Italy and distributed to this country by Submarex. They simply had different
finishes to distinguish between the two.These were available in 3/4 neck,
5/8 neck, 200 bar or 300 bar and any combination there of.

    The Thermo manifold is virtually identical in conceptual design, except
there is two different forgings for the right and left "K". This allows them
to have a true 8.5 center to center spacing for all new 8 inch dia.
cylinders available today. These cylinders are actually greater than 8 inch
dia. This requires true 8.5 spacing to allow for the 5/16 bolt between the
tanks. The old Dive Rite and Sea Elite did not allow for this (on newer
cylinders) unless you used a 1/4 inch bolt between the tanks. Regardless of
which tanks they are on, if you have more than 1/8 inch between the lock nut
and body forging of the crossbar on one of these older manifolds, then you
have most likely compromised the seal of the inside o-ring on the crossbar.
This means your down to one barrel seal, not two.
     The Thermo also uses a crush gasket on the bonnet nut instead of an
o-ring. The Thermo is available through Seagate cylinders, which Dive Rite
sourced them from. These should also be available in 300 bar before too
long, or may be already.

    The new Sea-Elite is now a duplicate of the original Italian product but
made in Asia. In past discussions with them, I assume they have addressed
the 8.5 spacing issue.

    The new Dive Rite is still made in Italy, from the original forgings,
with a longer crossbar to address the 8.5 spacing issue. These can easily be
distinguished from the others because "Dive Rite" is embossed in the valve
body and the number "100" is embossed in the crossbar body. These are
available in 3/4 neck, 5/8 neck, 200 bar or 300 bar, and any combination
there of.

    Dell Motes
    Dive Rite
    117 W.Washington St.
    Lake City, Florida 32055
    www.dive-rite.com

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