Tank bands for Faber LP85 tanks?

[Hepcat62]

Hi all,

I'd ask this on the tanks forum, but since I always prefer local advice... :D

I have a lead on a pair of used Faber LP85s in good shape for a really nice price, and I'm really close to committing on them. If I buy them I'll be doubling them up, and I have a couple of questions...

1) What size bands actually work on them? I've been told that these tanks are 7" in diameter. Will common 7.25" bands work on these? If not, does anybody have a recommendation for bands that would work (with a source for buying them)?

2) What do people find is a typical difference in weight-belt when compared to doubled up HP100s? The 100's are definitely attractive in terms of carrying less extra lead around...

Thanks!

[cool_hardware52]

Hi all,

I'd ask this on the tanks forum, but since I always prefer local advice... :D

I have a lead on a pair of used Faber LP85s in good shape for a really nice price, and I'm really close to committing on them. If I buy them I'll be doubling them up, and I have a couple of questions...

1) What size bands actually work on them? I've been told that these tanks are 7" in diameter. Will common 7.25" bands work on these? If not, does anybody have a recommendation for bands that would work (with a source for buying them)?

2) What do people find is a typical difference in weight-belt when compared to doubled up HP100s? The 100's are definitely attractive in terms of carrying less extra lead around...

Thanks!

Faber 85's are nice tanks. Highland Millwork used to make bands for these 7" diameter tanks, but sadly Highland Millwork is no more.

You can still source good quality 7" bands from TechDivingLimited

The Fabers are almost neutral empty vs about -2 each for HP100's

Tobin

[evad]

Hi all,
1) What size bands actually work on them? I've been told that these tanks are 7" in diameter. Will common 7.25" bands work on these? If not, does anybody have a recommendation for bands that would work (with a source for buying them).


From Piranha Dive Manufacturing:




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The welds are continuous and very good to excellent (on mine at least).

[Joe_Diver]

Hi all,

I'd ask this on the tanks forum, but since I always prefer local advice... :D

I have a lead on a pair of used Faber LP85s in good shape for a really nice price, and I'm really close to committing on them. If I buy them I'll be doubling them up, and I have a couple of questions...

1) What size bands actually work on them? I've been told that these tanks are 7" in diameter. Will common 7.25" bands work on these? If not, does anybody have a recommendation for bands that would work (with a source for buying them)?

2) What do people find is a typical difference in weight-belt when compared to doubled up HP100s? The 100's are definitely attractive in terms of carrying less extra lead around...

Thanks!

When I checked a couple of weeks ago, the only sources were OMS and Dive Rite. The OMS model is BD2570-K, which is what I ended up getting. I would have preferred Highland bands (sold by XS Scuba), but they don't make that size.

Mike

[andrewy]

You can use 7.25 or 7.0 bands from PIranha, they are the best. on 7.25 bands you'll need to cut your bolts a bit with sander. Do not double up HP100 as you looking for -28 negative :)
Faber 85 are negative 6.75 full to 0 empty (OMS version), what version are yours.?

[JBRES1]

. Do not double up HP100 as you looking for -28 negative :)
Faber 85 are negative 6.75 full to 0 empty (OMS version), what version are yours.?



Note: that the Faber FX100's ( 3442 psig ) are about -16# when doubled, its the HP-100's or the (3180psig + 10%) that are rocks at about -30# when doubled.

Jim Breslin

[andrewy]

yep, i was talking about above mentioned HP100

[rhlee]

Hi Brian,

You want 7" or (maybe 6.9") bands. 7.25" will not work and will put too much stress on the welds of the bands. Remember the bands are providing the rigidity to the system so it's important that you use the right bands for the job.

Most of the HP100s you see locally are either PST HP100's or Worthington/XS HP100's. I'd agree with Tobin that the weight difference between these tanks and the Faber 85s is about 2lbs.

The other nice thing about the 85s is that since they are a bit longer than the 100s (and since they are a bit more buoyant) they give you more a bit more options in terms of lead distribution on your body to help trim yourself out (if needed).

I live right up the street from the shop, if you want to stop by my garage sometime we can chat and I can show you what I mean.

Hope that helps,
-Rob





Hi all,

I'd ask this on the tanks forum, but since I always prefer local advice... :D

I have a lead on a pair of used Faber LP85s in good shape for a really nice price, and I'm really close to committing on them. If I buy them I'll be doubling them up, and I have a couple of questions...

1) What size bands actually work on them? I've been told that these tanks are 7" in diameter. Will common 7.25" bands work on these? If not, does anybody have a recommendation for bands that would work (with a source for buying them)?

2) What do people find is a typical difference in weight-belt when compared to doubled up HP100s? The 100's are definitely attractive in terms of carrying less extra lead around...

Thanks!

[Guy Alcala]

Hi Brian,
You want 7" or (maybe 6.9") bands. 7.25" will not work and will put too much stress on the welds of the bands. Remember the bands are providing the rigidity to the system so it's important that you use the right bands for the job.
Most of the HP100s you see locally are either PST HP100's or Worthington/XS HP100's. I'd agree with Tobin that the weight difference between these tanks and the Faber 85s is about 2lbs.

Rob, I think it's more than that. The most recent data I have shows the Faber LP85 as -3.80/+2.32 (full/empty), the PST E7-100 as -8.5/-1.0, and the Worthington X7-100 as -10.0/-2.5. So for double E7s you're looking at 9.40/6.64 lb. difference, and for double X7s it's 12.4/9.64 lb. difference. BTW, OMS seems to have found another supplier for their LP tanks, because the new tanks they're selling have very different buoyancy from the Fabers.

Guy

[cool_hardware52]

Rob, I think it's more than that. The most recent data I have shows the Faber LP85 as -3.80/+2.32 (full/empty),

I suspect these numbers are sans valves.

Tobin

[Guy Alcala]

I suspect these numbers are sans valves.

Tobin

The spec sheets I've seen all claim the buoyancy includes valves. Doesn't make it true.

Guy

[cool_hardware52]

The spec sheets I've seen all claim the buoyancy includes valves. Doesn't make it true.

Guy

There are a number of inaccurate tank spec lists on the net. You would hope Blue Steel has the right info listed.

I've used this one quite a bit, but I'm not vouching for every entry. Scuba Cylinder Specification Chart from Huron Scuba, Ann Arbor Michigan (http://www.huronscuba.com/equipment/scubaCylinderSpecification.html)

Look under the "OMS 85" this spec sheet reflects fabers OMS used to distribute.

I have a couple 85's just back from hydro, I should screw on a valve and toss one in the horse trough before I double them back up.

Tobin

[Guy Alcala]

There are a number of inaccurate tank spec lists on the net. You would hope Blue Steel has the right info listed.

I've used this one quite a bit, but I'm not vouching for every entry. Scuba Cylinder Specification Chart from Huron Scuba, Ann Arbor Michigan (http://www.huronscuba.com/equipment/scubaCylinderSpecification.html)

Look under the "OMS 85" this spec sheet reflects fabers OMS used to distribute.

I have a couple 85's just back from hydro, I should screw on a valve and toss one in the horse trough before I double them back up.

Tobin

Yeah, I use that one too, along with the Dive Gear Express one and the manufacturer specs when I can find them. One thing the Huron Scuba one claims is that the PST and OMS empty weights include the valves, something I've never been able to confirm. I know my OMS LP112 (made by Faber) weighs 44 lb. empty with valve and boot, vice the 41 lb. the spec sheet claimed. Assuming 1.5 lb. for each of the accessories gets me from 41 to 44. The OMS (and Faber Blue Steel) specs were different from the ones Huron gives from at least from the 2007 OMS catalog and a Faber spec sheet from the same era, as well as their current one online.

Anyone know where OMS is getting their tanks from now? They only show LP tanks, and their 85 is credited with a weight of 38.5 lb. and buoyancy of -10.0/-4.44 lb., which doesn't equate to any manufacturer's tank I'm aware of. BTW, how is it that buoyancy changes for the same quantity of gas vary so much from manufacturer to manufacturer? ISTM the gas should weigh the same, regardless.

For example, according to the specs my OMS (made by Faber) LP112s have buoyancy of -8.0/-1.0 lb., or 7.0 lb. difference in buoyancy. Yet PST or Worthington HP100s claim a buoyancy change of 7.5 lb for 12 cu. ft. less gas. What am I missing - I know the pressure's different, but if we're talking about the same number of molecules of gas, packing it into a smaller space shouldn't alter the weight.

Guy

[Hepcat62]

Well, after waiting a few weeks Piranha finally got the 7" bands back in stock, so they're on the way. Now I'm just another mk25 and a wing short of having my first doubles setup and diveable. I'm hoping to order both next week, so it won't be long now! :)

[KWS]

There are a number of inaccurate tank spec lists on the net. You would hope Blue Steel has the right info listed.

I've used this one quite a bit, but I'm not vouching for every entry. Scuba Cylinder Specification Chart from Huron Scuba, Ann Arbor Michigan (http://www.huronscuba.com/equipment/scubaCylinderSpecification.html)

Look under the "OMS 85" this spec sheet reflects fabers OMS used to distribute.

I have a couple 85's just back from hydro, I should screw on a valve and toss one in the horse trough before I double them back up.

Tobin

i tqlked to a faber distributor and he said that bouyancys were based on the italian valves what were 1+lbs heavier than the ie thermo's that are used in the usa. the heavier valves are used because the higher working preasures allowed in non-usa.