LLKZ16
Contributor
matt_unique:
:06:
HP-119 = 41 (Lbs.)
HP-130 = 43 (Lbs.)
Two 80s or One 120?
- Thread starter V. G. McGillicuddy
- Start date
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:06:
HP-119 = 41 (Lbs.)
HP-130 = 43 (Lbs.)
HarryWhisman
Contributor
VG--I'm a new guy about to pull the trigger on some new tanks and for me it's going to be HP120s.
Of course I'm 6'6", 250lb, diving in cold water with little guys and suck air like a Lear jet.
What's your excuse?
Of course I'm 6'6", 250lb, diving in cold water with little guys and suck air like a Lear jet.
What's your excuse?
cyklon_300
Contributor
w/ H-valve is my choice...I have almost the same gas available as double Al80s, fills cost half as much, only one VIP and Hydro fee instead of two and it weighs much less.
The buoyancy characteristics are also much better for diving dry than two Als...
Tried a steel 120 and had issues with how long it was...
The buoyancy characteristics are also much better for diving dry than two Als...
Tried a steel 120 and had issues with how long it was...
pickens_46929
Contributor
Ok, so I'll weigh in on the issue... seeing as how I have both double-85 LPs and an HP-120. There are times when doubles make since but you have to be careful with regard to LP steel tanks. 1) many times they are rated as 85 cu.ft. only with a (+)... or 2640 psi... so when they are hydro'd and you either don't ask for or don't get a (+)... you're at 2400 psi... which is now ~77.5 cu.ft. 2) many times there are people that overfill the tanks or get them overfilled... so with my current tanks 2800~3000 psi isn't unusual... make sure you double up your burst discs though so a weak disc doesn't cause problems...
That all said, I like my doubles for their redundancy and all... but like the HP-120 for other reasons, especially diving wet rather than dry or if space on the boat is an issue... some places don't accomodate doubles very well... so the HP-120 works better in those situations...
Heck, even if you don't double the steel 80's up... they make super little singles... I'd rather have then sometimes than my AL-80's...
That all said, I like my doubles for their redundancy and all... but like the HP-120 for other reasons, especially diving wet rather than dry or if space on the boat is an issue... some places don't accomodate doubles very well... so the HP-120 works better in those situations...
Heck, even if you don't double the steel 80's up... they make super little singles... I'd rather have then sometimes than my AL-80's...
lamont:
I've been known to do that with my 80s.
LLKZ16
Contributor
I use an HP-130 and dive with friends that use Al80's.
When they are ready to go with 400psi left, I usually have 1200psi with about 40-50 min left on my computer.
I got to get my friends to change!
When they are ready to go with 400psi left, I usually have 1200psi with about 40-50 min left on my computer.
I got to get my friends to change!
LLKZ16
Contributor
hoosier:
They have singles...Sorry to leave that important fact out...:05:
I was just comparing the situation that spectrum was talking about.
OP
V. G. McGillicuddy
Contributor
Hi Again,
I thought I made a post at about 4:20 (CST) but now I can't see it. Must have been lost in the ether-net.
Anyway, thanks all for the input! After reading all your opinions, I think I'll go for the two 80s if I can get them. I don't plan on doubling up, and I'm sorry that my original post was interpreted that way by some. What I meant was, is it better to have two smaller tanks, and have to switch them more often, or to have one big tank (at a greater cost)?
I talked to one of my LDS owners (there are two dive shops in the area, this is not the one with the tanks) and he said that a DIN adapter, if it was available, would run about $70 for the Conshelf SE2 that I'll be getting.
The other LDS owner (the one who may have the tanks available) said that he thinks the hydro dates are fairly recent, but he's not sure.
About myself: I live in Wisconsin, and will be diving in the local lakes and quarries. Sometimes I will dive from shore, and sometimes from a small (14') boat. Naturally, there is no surf to worry about.
I have recently been OW certified, and I have no regular dive buddies yet.
Thanks Again,
V. G. McG.
I thought I made a post at about 4:20 (CST) but now I can't see it. Must have been lost in the ether-net.
Anyway, thanks all for the input! After reading all your opinions, I think I'll go for the two 80s if I can get them. I don't plan on doubling up, and I'm sorry that my original post was interpreted that way by some. What I meant was, is it better to have two smaller tanks, and have to switch them more often, or to have one big tank (at a greater cost)?
I talked to one of my LDS owners (there are two dive shops in the area, this is not the one with the tanks) and he said that a DIN adapter, if it was available, would run about $70 for the Conshelf SE2 that I'll be getting.
The other LDS owner (the one who may have the tanks available) said that he thinks the hydro dates are fairly recent, but he's not sure.
About myself: I live in Wisconsin, and will be diving in the local lakes and quarries. Sometimes I will dive from shore, and sometimes from a small (14') boat. Naturally, there is no surf to worry about.
I have recently been OW certified, and I have no regular dive buddies yet.
Thanks Again,
V. G. McG.
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