Questions tagged [npt]
7 questions
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votes
2 answers
Where is the one-eighth in 1/8-27 NPT?
Where is the "one-eighth" in 1/8-27 NPT? I know it has 27 threads per inch. I see references that 1/8" is the nominal pipe size, does that mean the hole inside the thread is 1/8" ID? Or something else?
kbyrd
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Can you break a black iron fitting by overtightening?
I recently did some plumbing work in my house which involved using threaded (NPT) black iron fittings in the 1" and 2" sizes.
At the outset I was concerned that I could overtighten them and crack the female side. But in a few cases I had to really…
StayOnTarget
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1 answer
MIP threaded pipe in NPSM female threads
I'm installing a freestanding tub faucet. According to the manufacturer's spec sheet the supply lines have 1/2 inch female NPSM threads, which I believe is a straight thread. I'm trying to attach these to 1/2 inch PEX-B. All of the male thread PEX…
balexand
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Why are my fittings leaking?
I am installing a new Hansgrohe shower. It came with this part https://www.hansgrohe-usa.com/articledetail-showerpipe-basic-set-16181181 that I decided to connect to this https://www.amazon.com/dp/B002UQ1ZBA - They are both 1/2 NPT and I am using…
ebcrypto
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Two reducers in-line from air compressor to air tool?
Previous house owner run PEX pipe in the garage from a 60 gal air-compressor to multiple hose reels. One of them developed a leak and I had to cut through copper pipe to remove it - it was all hard-piped from PEX to a chunk of adapters and copper…
Chris
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Installing shower filter - NPT adaptor for larger intake?
I am in the process of installing a shower filter, and am encountering a challenge where shower head and water pipe are not NPT.
The shower pipe has a slightly larger female "wrapper" (apologies as I lack the correct vocabulary. I am holding said…
daspianist
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3 answers
Which side of an over-tightened brass NPT joint needs to be replaced?
I have a brass nipple screwed into a brass elbow and the joint is leaking. After half a dozen tries at re-wrapping with teflon tape, I decided to see if I could just tighten the problem away. ~150 foot pounds of torque later, the leak had slowed but…
Sparr
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