I see a lot of ball valves with BSP threads (male and female). Will these work with standard 3/8” NPT quick connect fittings?
Thanks!
Nope. You might be able to make them fit because the threads are similar but you also will likely damage threads and leaks are more likely. Get a BSP to NPT adapter or better yet order one from a good company like Presuretek or Southside
According to the Presure Tek retailer you recommended you can use BSP threads with NPT. They recommend wrapping with 6-7 wraps of teflon tape. Any thoughts???
BSP and NPT are close enough that once you use a thread sealer (tape or loctite) you should be fine.
It appears that the threads are close enough that the two different types could be made to somewhat fit together I believe I’ll just find a NPT valve or order some BSP to NPT adapters. Thanks for all the info.
According to the Presure Tek retailer you recommended you can use BSP threads with NPT. They recommend wrapping with 6-7 wraps of teflon tape. Any thoughts???
You can make it work but if you need to replace the quick connects it will be annoying.
Here’s a FPT version. They’re available from GP with a little bit of googling.
Sorry, why the insistence to make BSP work with NPT fittings for a high pressure piece of equipment?
I agree. I just see more BSP fittings than NPT. It seems to be the “norm” to cross the two thread styles. I also see no reason to go that route. Buy a NPT valve or go BSP and have addition costs for adapters.
1 Like
BSP is the standard thread system used throughout much of Europe and other overseas markets, while NPT is primarily the North American standard. A significant number of the major pressure washer manufacturers for professionals are based in Italy, so BSP is extremely common on the pumps and components they produce.
Here in North America, NPT fittings are generally easier and cheaper to source, so using NPT fittings is often the most practical option and will work perfectly fine with BSP threads when a thread sealant is used.
Where I would be more cautious is with components made from brass, such as pump heads (highly likely that the inlet/outlet on your pump is BSP), unloaders, and any part that is routinely assembled and disassembled. Brass being relatively soft compared with steel, over-tightening can deform the threads, and repeated assembly and disassembly can eventually wear the threads and contribute to leaks over time. However for things like quick connects on hoses and ball valves that are relatively inexpensive and routinely replaced, I wouldn’t worry about it at all. Just get whatever fitting is easily available and use a thread sealant as normal.
1 Like
