bubblemaker20
Guest
Im considering diving doubles but im not really sure what size tanks to double up. Im an average size girl and i would like to go with steel tanks. Should i go with steel 80's or 100's or are they to much???
Thinking of doubles???
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Scubaroo
Contributor
What's the intended use of the doubles? What will your buddies be using?
Girls cant dive doubles!!! What are you thinking!!! 
Just kidding... I know a few women divers, and they dive everything from 104's to aluminum 63's. You need to decide what you need based on your dive plans, and what you can reasonably use (some women cant handle double 104's, neither can some men that I know).
Just kidding... I know a few women divers, and they dive everything from 104's to aluminum 63's. You need to decide what you need based on your dive plans, and what you can reasonably use (some women cant handle double 104's, neither can some men that I know).
OP
bubblemaker20
Guest
Im thinking of doing the DIR-F and some technical courses so ill need doubles eventually. My buddy dives double HP steel 130's but those are way to big for me
You might find that 85 fabers are good or maybe even look at the E-series of cylinders such as E-8 100's
strider
Guest
A friend of mine uses twin HP 80s and he really likes em. He's short and avg. build with good air consumption, easily matches me with my twin 100s, but I'm bigger.
I believe most HP steel 80s are lighter than the LP 80s or alum 80s and also more negative, which would let you take a bit off your belt. I would say look at the specs for pressed steel and oms tanks.
Also, how is your air consumption? How much air do you really need to have. I have a LP 131 with an H-valve that gives me tons of air at almost half the weight of my twins. I believe DIR will let you do everything with one large cylinder as well, especially if it's more than enough air for the dive.
http://www.lloydbaileysscuba.com/PST E Series Tanks.htm
http://www.omsdive.com/cyl_spec.html
I believe most HP steel 80s are lighter than the LP 80s or alum 80s and also more negative, which would let you take a bit off your belt. I would say look at the specs for pressed steel and oms tanks.
Also, how is your air consumption? How much air do you really need to have. I have a LP 131 with an H-valve that gives me tons of air at almost half the weight of my twins. I believe DIR will let you do everything with one large cylinder as well, especially if it's more than enough air for the dive.
http://www.lloydbaileysscuba.com/PST E Series Tanks.htm
http://www.omsdive.com/cyl_spec.html
boomx5
Contributor
I know several people who use the PST LP 80's and say they really like them. They are not that heavy and a great little setup for doing shore entries.
reubencahn
Contributor
You can do DIR-F with a single. I did. Mine happen to be hp 100s, but I could as easily have used AL80s.
But if you're thinking of moving on to doubles and technical diving, it would make sense to take your DIR-F with the rig you will eventually be using. Also, if you're thinking of moving into the technical realm with GUE, you should probably consult with an instructor about tank recommendations. GUE tends to approve of only a limited number of tanks. For example, there was a guy in my class diving twin hp120s who had some trim problems. The instructor suggested a number of times that he should get rid of the tanks that GUE really recommends sticking with either AL80s or LP104s. I think there is a good amount of flexibility at the DIR-F level but the higher you go, the more DIR's emphasis on uniformity becomes important.
I will be taking RecTriox in the spring and will use my hp100s. They seem to work well for me as singles. But if I move on to TechI, I'll follow whatever my instructor recommends--probably twinned AL80s at first. You might want to post in the DIR section as there are a couple GUE instructors who frequently answer questions there.
But if you're thinking of moving on to doubles and technical diving, it would make sense to take your DIR-F with the rig you will eventually be using. Also, if you're thinking of moving into the technical realm with GUE, you should probably consult with an instructor about tank recommendations. GUE tends to approve of only a limited number of tanks. For example, there was a guy in my class diving twin hp120s who had some trim problems. The instructor suggested a number of times that he should get rid of the tanks that GUE really recommends sticking with either AL80s or LP104s. I think there is a good amount of flexibility at the DIR-F level but the higher you go, the more DIR's emphasis on uniformity becomes important.
I will be taking RecTriox in the spring and will use my hp100s. They seem to work well for me as singles. But if I move on to TechI, I'll follow whatever my instructor recommends--probably twinned AL80s at first. You might want to post in the DIR section as there are a couple GUE instructors who frequently answer questions there.
matt_unique
Guest
strider:
Did you say you used a LP steel 131CF cylinder?????? I used a LP steel 120 with H-valve for my Deco Procedures class and the thing weighed a level ton. I did not realize they made larger LP tanks. That thing must be a bear.
--Matt
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