UPDATE. One tank with an initial hydro date of 10/1941 passed hydro no problem. The other tank with an initial hydro date of 10/1942 failed hydro. The guy that does my hydros is very vintage savvy and he was really bummed it didn't pass. If it would be possible for it to pass he would have done so. Currently looking around for an equivalent round-bottom USN 1800 psi ALFCO tank. I have the NOS 1/2" npt tapered manifold, new reducer bushings, new burst discs and bands but just one lonely 38 cu ft tank. Hate to sink any more $ and time into this project but I'm a glutton for punishment. If anyone gets a line on a replacement tank kindly let me know. Haven't decided yet between going forward and just abandoning the project. Such is life. Thanks. Mark
My friend's dive shop does in-house hydros. As vintage friendly as they are, they won't hydro with bushings in place. May have to do with the bushing psi rating being less than or equal to 5/3 hydro test pressure of tank. Dunno. My 2psi.technidiver2 wrote: ↑Wed Oct 23, 2019 9:07 amQuestion regarding the tanks and reduced bushing:
Can you hydro the tanks WITH the bushing in the tank? Or does it have to be removed for hydro?
I know a local who hydros 1/2 NPT but I don’t know if they’re able to do 3/4 NPT, so if I need a tank hydroed I’d just leave the bushing in. Let me know if this is an issue. Would hate to get into trouble with the scuba police again
You are absolutely correct. For the required visual inspection, it is required to inspect the threads and therefore any adapter bushing has to be removed, during the visual inspection.
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