[PSUBS-MAILIST] HP Scuba hose

[Sean T. Stevenson via Personal_Submersibles]

Just for the sake of completeness, the SCUBA hose fittings that mate to the regulator would obviously be the same thread in class 2A (external). SCUBA second stage regulator hose connections are 9/16-18 UNF, class 2B on the hose end and 2A on the regulator fitting.

Sean

-------- Original Message --------
On Mar 11, 2018, 07:52, Sean T. Stevenson via Personal_Submersibles wrote:

> HP SCUBA regulator orifice is 7/16-20 UNF 2B thread. There are Swagelok and other fittings which will work, but watch your wrench clearances when using multiple adjacent ports. On that note, LP SCUBA ports are either 3/8-24 UNF - 2B (most common) or 1/2-20 UNF - 2B (less common). Be aware that while most HP SCUBA SPG hoses have a pinhole bore in order to reduce the consequences of a HP hose failure, some SCUBA regulators incorporate the pinhole restriction into the regulator itself, which will limit the available flow rate at high pressure. Of course, if your drawing gas off at high pressure anyway, why go through the reg?
>
> Sean
>
> Sent from ProtonMail mobile
>
> -------- Original Message --------
> On Mar 11, 2018, 07:12, Jon Wallace via Personal_Submersibles < personal_submersibles at psubs.org> wrote:
>
>> Are there adapters that can change a SCUBA HP hose fitting to NPT?
>>
>> Jon
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