HP 80 vs. LP 85's (looking for info)

[jsalty]

Hello,
I am looking for a comparison (Pros / Cons please) between a set of HP80's and LP85's.

I currently dive LP95's. They have become too heavy since having back surgery a year ago.

Looking to lighten up my load but would also like to keep as much gas as i can.

any insight would be welcomed.

Thank you

If this is in the wrong section I apologize in advance.

[Superlyte27]

LP85's hold a butt ton more air if you can get a cave fill.

(That's a metric butt ton, not an SAE butt ton, just FYI)

[jsalty]

LP85's hold a butt ton more air if you can get a cave fill.

(That's a metric butt ton, not an SAE butt ton, just FYI)

I understand but is the weight that much more great than the HP80's?

My LP95's routinely see 3100psig (2640=95 cubic feet) don't figure the HP80's will see 3900psig.

[Rich]

I understand but is the weight that much more great than the HP80's?

My LP95's routinely see 3100psig (2640=95 cubic feet) don't figure the HP80's will see 3900psig.

The baseline of L85's is roughly 6.4, the base line of HP80's is around 4.6, even AL80's have a higher baseline (5.2) than that! To me that speaks volumes, pun intended.....

Safe diving,

Rich

P.S. then dissimilar tank calculations come into play......

[jsalty]

The baseline of L85's is roughly 6.4, the base line of HP80's is around 4.6, even AL80's have a higher baseline (5.2) than that! To me that speaks volumes, pun intended.....

Safe diving,

Rich

P.S. then dissimilar tank calculations come into play......

That it does..

Thanks

[RN]

Make sure you also compare between manufacturers. Faber 95s are actually lighter than Worthington 85s. You may just want to consider going sidemount. It will save your back a lot more stress than going with smaller tanks will.

[saxplayer1004]

agreed with Rob. I have bad knees and although it's not anywhere near as bad as a back injury, I still have problems carrying large tanks. I'm a tall guy, and I sidemount with HP120's. Still a ton of gas, and it's not on my back... I know a lot of people that use HP100's as well. I prefer the 7inch diameters over 8's though...
If you end up going the HP80 route, let me know as I would trade em for the LP95's

[Slüdge]

HP-80s are very rare. You may be confusing them with HP-100s, which were the same as LP-80s but with a smaller neck. The LP-80s became E7-100s when they re-marked them. Some people call the E7-100s "HP-100s" but they aren't the same thing.

[Superlyte27]

There's a set of HP80's floating around that no longer has an owner. I think they are for sale. I'll ask this week. If you are looking for some.

[Slüdge]

jsalty, you realize the HP-80s are VERY small, right? A pair holds the same as a single LP-120.