aquaoren:
The older steel 72's have a 1/2" opening.
Double tanks means double regulators?
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The older steel 72's have a 1/2" opening.
aquaoren
Contributor
My steel 72's from the late 60's and early 70's have 3/4-14 NPSM threads.Mike Nebel:
aquaoren:
Older. Back in the 50's, a tapered, 1/2" valve was in use and still occasionally show up in dive shops for inspections and hydros.
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