Quote:
originally posted by hara
Are the TPIs of BSPT and NPT the same?
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The BSP & BSPT threads are similar to, but not interchangeable with American NPT pipe threads. The thread pitch is different in most sizes, and the thread angle is 55° instead of 60° angle found on NPT threads.
I am not saying that it absolutely will not work. However, considering you will be pumping water through this around some expensive parts, a real BSPT tap might be in order. I can warn you, tho....they are not easily found in the states.
Quote:
originally posed by sevisehda
8, Will a standard 'straight' tap work with an NPT fitting?
9, Anyone have a link where I could buy some of these NPT taps?
10, As I look at the threads on this 3/8 fitting I notice the material is quite thick. Has anyone tried removing the existing threads and replacing it witha slightly smaller thread?
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8- No
9- I can't believe that any hardware store would NOT have any of these. Instead of asking for a 1/4 NPT tap, try just asking for a 1/4" pipe tap. I know I have seen these at Lowes/Home Depot. The sales guy might not know what they are...
10- would be easier to just buy a fitting with a smaller thread. There are 3/8" fittings that have a 1/8" NPT thread on them. These I have seem in McMaster Carr....have not seen them at any typical hardware store.