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Chris , what you will learn is that if IANTD teaches it, it is probably =
wrong. This particular piece of farm animal stupidity is from IANTD. =
Only the worst idiot would tell you to keep your crossover close to =
closed .
This is a huge risk for gas mixing error, and there are no benefits. =
Manifolds do not "fail", per se, they begin to leak ( I am not talking =
about real pieces of shit, but a good manifold). The failure mode is =
knocking off the right side knob ( in the on position) and then having =
that reg freeflow, forcing you to shut down the isolator to save your =
gas - a two part failure.=20
Failure to mix the gas properly is the real risk. In the WKPP, we do not =
allow anything this stupid , or most anything else like this taught by =
IANTD.
----- Original Message -----=20
From: Chris Tibble=20
To: techdiver@aquanaut.com=20
Sent: Thursday, April 12, 2001 1:28 PM
Subject: Isolating Manifold Question
Just a quickie. I'm just about to buy my first twinset with a =
manifold. I've dived twins before, independents because of fiscal =
reasons (I'm a poor student!) What I need to know is this. Some of the =
people I have talked to who dive manis only open their iso knob about =
1/2 a turn, whilst others open it all the way. Thinking about it I can =
see advantages and disadvantages to both:
=20
All the way
Adv: No risk of turning wrong way
=20
Disadv: May get stuck if turned on all way
Have to turn it 3 turns (or whatever)
=20
Part way
Adv: V fast way of isolating
=20
Disadv: Can turn it the wrong way=20
Not having it open all the way may limit equalisation =
across the manifold.
=20
Now any or all of this may be unmitigated rubbish, but it's just what =
I was thinking about last night.
=20
Any comments/suggestions as to how best to do it?
=20
As this is my first post, go easy on me - I'm still learning!
=20
Many thanks,
=20
Chris
=20
=20
--
It takes a big man to cry, but it takes a bigger man to laugh at that =
man.
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<META content=3D"text/html; charset=3Diso-8859-1" =
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<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D4>Chris , what you will learn is that if IANTD teaches =
it, it is=20
probably wrong. This particular piece of farm animal stupidity is from =
IANTD.=20
Only the worst idiot would tell you to keep your crossover close to =
closed=20
..</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D4>This is a huge risk for gas mixing error, and there =
are no=20
benefits. Manifolds do not "fail", per se, they begin to leak ( I =
am not=20
talking about real pieces of shit, but a good manifold). The failure =
mode is=20
knocking off the right side knob ( in the on position) and then =
having=20
that reg freeflow, forcing you to shut down the isolator to save =
your gas -=20
a two part failure. </FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D4>Failure to mix the gas properly is the real risk. In =
the WKPP,=20
we do not allow anything this stupid , or most anything else like this =
taught by=20
IANTD.</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A href=3D"mailto:chris.tibble@bt*.co*"=20
title=3Dchris.tibble@bt*.co*>Chris Tibble</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
href=3D"mailto:techdiver@aquanaut.com"=20
title=3Dtechdiver@aquanaut.com>techdiver@aquanaut.com</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Thursday, April 12,
2001 =
1:28=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Isolating Manifold=20
Question</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>Just a quickie. I'm just about to buy =
my first=20
twinset with a manifold. I've dived twins before, independents because =
of=20
fiscal reasons (I'm a poor student!) What I need to know is this. Some =
of the=20
people I have talked to who dive manis only open their iso knob about =
1/2 a=20
turn, whilst others open it all the way. Thinking about it I can see=20
advantages and disadvantages to both:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>All the way</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Adv: =
No=20
risk of turning wrong way</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Disadv: May get =
stuck if=20
turned on all way</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> =
Have to turn it 3 turns (or=20
whatever)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Part way</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Adv: =
V fast=20
way of isolating</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Disadv: Can turn it =
the wrong=20
way </FONT></DIV>
<DIV><FONT face=3DArial=20
=
size=3D2> &nbs=
p; Not=20
having it open all the way may limit equalisation across the=20
manifold.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Now any or all of this may be =
unmitigated=20
rubbish, but it's just what I was thinking about last =
night.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Any comments/suggestions as to how =
best to do=20
it?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>As this is my first post, go easy on =
me - I'm=20
still learning!</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Many thanks,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Chris</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>--</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>It takes a big man to cry, but it =
takes a bigger=20
man to laugh at that man.<BR></DIV>
<DIV><BR></DIV></BLOCKQUOTE></FONT></BODY></HTML>
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