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  1. captain

    brass or copper rivets

    One eight inch diameter is too big and pop rivets are not correct. I think 3/32" is about right. Expect to buy in amounts of 100 or 500. Solid Copper Rivets | Copper Solid Rivets | Copper Rivets | Jay-Cee Sales & Rivet, Inc.
  2. captain

    Force vs Pressure vs Surface Area and Tank Valves

    Sportways had 1/2" NPS tanks and valves for a short while before 3/4 NPS became the standard
  3. captain

    Old steels denied fills due to store "policy"

    Actually no. A diver can fill one cylinder several times on one weekend for half the weekend of the year. By contrast a welding cylinder might get filled only 3 or 4 times a year on average. As a guy who has a welding and cutting rig for personal use I can usually go 5 plus years before needing...
  4. captain

    Hydro RIN ID marking is a "?"

    As a grammar school school kid in the mid 50's fascinated with diving I would go to Roland's store on North Rampart and stare at the display of U S Divers equipment. Bought my first real mask there, a Squale.
  5. captain

    Old steels denied fills due to store "policy"

    Take a steel tank to an good automotive machine shop and have them magnaflux it.
  6. captain

    How many cylinders do you own?

    6 steel 72's, 2 of the 6 doubled and double US Navy non magnetic aluminum 80's
  7. captain

    Vintage gear and memorabilia auction.

    Joe Savoie lived across the street from a good friend of mine in Boutte, Louisiana Rare Joe Savoie Stainless Steel Diving Helmet 1970s - Mar 14, 2020 | Nation's Attic Inc. in KS Joe Savoie
  8. captain

    Hydro RIN ID marking is a "?"

    Be that as it may but there are no RIN's on my requalified tanks prior to about 1985. I have some tanks that are ICC 3AA not DOT 3AA. One tank requalified in 66 has ROL 4.66 stamped, the company was that did it was Roland's Sporting Goods in New Orleans, LA, one of the first places to sell scuba...
  9. captain

    Hydro RIN ID marking is a "?"

    I have 3 tanks hydroed in the early 80's, one in 83 has no RIN one in 86 does, none in the 70's have RIN. The change was probably about 85. Original hydros on PST tanks in the 60's and 70's were done by Cochran Labs, their symbol was an L in a C. Norris used an N in a diamond. Notice the Norris...
  10. captain

    Hydro RIN ID marking is a "?"

    Before DOT began issuing 4 digit identifiers to hydro testers they could use any symbol they wanted as an identifier. In this case the shop used a ? mark. I have several 72 from the 50's and 60's, most hydro's done before the mid 80's have various symbols between the month and year.
  11. captain

    Is dive certification really necessary?

    Then just call me dumb enough. By the time I was 24 I had the equipment, the compressor and the boat but no certification.
  12. captain

    Survivor Bias

    Post of the day. I started diving at 14, now I am 76, over the years adjustment had to be made as the ageing process and medical issues arose. Depth and surface conditions have to be factored in, now it mostly shallow calm water. No more diving in 4 foot seas and 3 knot current 30 miles off...
  13. captain

    Galling. (Preventative Measures.)

    Cheap stainless galls easier than good stainless. Don't over tighten, us a product specifically for the application such as. Never Seize Mariner's Choice Anti-Seize
  14. captain

    Tank Valve IDs and Max Fill Pressures

    Any valve at any pressure is only as strong as the threads on the valve and the threads on the tank. Threads on a brass valve are stronger than threads in an aluminum tank and weaker than the threads in a steel tank. If the tank of any material doesn't fail and the valve has no burst disc and if...
  15. captain

    Tank Valve IDs and Max Fill Pressures

    There is no pressure rating on the valve itself, use is determined by the burst disc rating.
  16. captain

    Can anyone help me identify this old US Divers/Luchard compressor?

    I don't know if the Tom you spoke to is me but my name is Tom.
  17. captain

    Can anyone help me identify this old US Divers/Luchard compressor?

    I have had an operating Luchard H6 since 1968. They are tough as nails. That said parts are no longer available and haven't been for 40 years. This is a deal where you run it until it breaks then scrap it or sell it for parts so it needs to be priced accordingly. I would say $600 to $800 but I...
  18. captain

    Boat Capsizes - Boynton Inlet

    Destin inlet can get pretty bad with an out going tide and a south wind. I have run it many times. You can sit off to the side and watch the sets then pick when you want to.
  19. captain

    Is dive certification really necessary?

    Personal opinion. The BC has led to a of problems. I believe the BC should not be introduced to students until they can master buoyancy without it. It is a crutch for poor watermanship.
  20. captain

    Removing paint from galvanized tank

    Paint stripper won't hurt the galvanize.
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