Thread size on LP and 2nd stage hoses

[Bryan@Vintage Double Hose]

I'm at work and trying to find a fitting! Can anyone tell me what the tpi and or size is of either end of an LP hose? Thank You

 

[brian cooper]

Hi OWI,
At the 1st stage end:-
LP is generally 3/8"UNF female or 1/2"UNF(on some Aqualung/Apeks number 1 ports. HP is now 7/16"UNF (but older regs quite often had 3/8" UNF)
Very old Poseidons had 1/8"gas thread on the first stage but are now LP 3/8"UNF /HP 7/16"UNF

On the 2nd stage end they are normally 9/16"UNF female but the size of the spigot/O-ring sometimes varies with make. Poseidon are different again for both the Cyclon and the Jetstream (sorry don't know what thread) but the hoses are unique to Poseidon.

I've found one other make 2nd (Spartan Kawasaki X2) from the 1970's that is also unique 9/16" dia but a courser thread than UNF....If the hose goes you throw away the reg.....I've currently got 2 of those and the hoses are still ok for now

Best of luck with your search

Brian C

 

[phgachoud]

For UNF you can find more data here

UNC and UNF - Unified Coarce and Unified Fine Inch Threads

ANSI/ASME B1.1 Unified National Thread - UNC Coarse series and UNF Fine series.

www.engineeringtoolbox.com

For NPT here NPT American Taper Pipe Thread ANSI B 1.20.1

 

[uncfnp]

Holy Cow Batman. It’s not even Halloween yet and we have a Zombie thread!

 

[herman]

I did a double take on this one too....why on earth would Bryan be asking this.