Author Topic: NPT to BSP fittings  (Read 208 times)

d_boom

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NPT to BSP fittings
« on: October 22, 2018, 06:09:20 AM »
My fill adapter which came with my scuba tank (Din 300 fitting) has a large diameter hose which wastes air when I refill.
I purchased a Huma microbore fill hose to replace the the large diameter hose to conserve air.  My problems is how to
adapt the Huma microbore hose with female 1/8BSP coupler on both ends, the fill adapter which uses female 1/4NPT
threads.  The Foster female adaptor has female 1/8 NPT threads again I need to go from  female 1/8 BSP to female
1/8 NPT threads.  Help, the web sights selling air tanks for airguns I have visited have nothing available.


  • Wichita, Kansas

Alan

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  • Roswell, New Mexico
Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.

caniborrowsomeammo

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Buncha BB guns that I don't get to shoot as much as I like. Building duck boats now that I'm "retired".

d_boom

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Re: NPT to BSP fittings
« Reply #3 on: October 22, 2018, 02:21:14 PM »
Thanks for your help, the micro hose with 1/8" NPT connections would be the best deal, but I had already
purchased the Huma microbore hose.  I did another search on the internet and got lucky - Malone Specialty
Co offers male adapters 1/8 NPT to 1/8BSP and 1/4 NPT to 1/8BSP among many other options, but there
is that $25 min., so bought 2 of each for spares.  Fitting I purchased are rated at 5000 psi and are made
from steel not brass.  SS steel is also available, but at a much higher price. 
  • Wichita, Kansas

d_boom

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Re: NPT to BSP fittings
« Reply #4 on: November 06, 2018, 05:18:01 PM »
I received the fittings from Malone Specialty Co. 1/8 NPT to 1/8BSP and 1/4 NPT to 1/8BSP.
Shipping was an ouch almost doubled the cost, but the fitting worked as they should on my
micro-bore hose.  No leaks, tested the micro-bore hose and fittings using a dead head - held
pressure 4,000 pis without a drop for 20 minutes.  Now I don't have to bled off so much air
after filling my PCP's from my tank. 
  • Wichita, Kansas