NPT and BSP [British Standard Pipe] Compatibility

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  #1  
Old 03-28-16, 06:24 AM
J
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NPT and BSP [British Standard Pipe] Compatibility

Can G1/2" fittings be used with NTP threads? So far in my small and unprofessional poll about half say thread angle and depth make them incompatible, the other half say the combination works fine. It's for a shower supplied by a pump so pressure isn't critical other than some being required, more being desirable.
 

Last edited by ray2047; 03-28-16 at 08:09 AM. Reason: Add info to title.
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Old 03-28-16, 09:54 AM
Z
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From my brief Google searching, I found,
An NPT male will fit into a BSPT fitting or vice versa but they will not seal. ... Thread sealant is needed to seal the male and female fitting together.
Ralston Instruments - Made in the USA

So it sounds like it will work for your application.

I'll admit to having zero experience with BSP threaded pipe.
 
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Old 03-28-16, 11:55 AM
J
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I'll try it...maybe a couple of times before dry-walling and painting...if it doesn't work I'll get a few very expensive G thread 1/2" female to NPT thread 1/2" male adapters (http://www.amazon.com/Thread-Female-...to+npt+adapter).
Is there a particularly good thread sealant or is thread seal tape good at such things?

Thanks Zorfdt
 
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Old 03-28-16, 12:17 PM
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I would suggest a hardening type of sealant, definitely NOT Teflon tape. Locktite makes a few different hardening type sealants and there is always the old standby of Permatex number one.
 
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Old 03-28-16, 12:59 PM
J
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Locktite, G1/2" and NPT 1/2" it is than.

Thanks folks,
Jim
 
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