I have an arb selenoid and I'm trying to figure out how to tie it in to my OBA manifold. I was going to put it on a standard npt regulator, but it didnt want to thread easy. Are the threads something different? or should I just jam it?

probably metric

Originally posted by kidwired
I have an arb selenoid and I'm trying to figure out how to tie it in to my OBA manifold. I was going to put it on a standard npt regulator, but it didnt want to thread easy. Are the threads something different? or should I just jam it?


Kid, it should be a standard 1/8 NPT thread.
In any case, what are you trying to use it for?
For the pressure switch for your OBA?
What type of OBA are you running?
I may have something way better for you, than that 80 psi on 95 psi off switch.

its a standard 1/4" NPT thread shouldnt be a prob.
i'm interested in what h8monday has thats better???

k just did not want to force it if it was the wrong thread :rolleyes: I'm the kinda guy that has to sticj w/ a 3/8 driver of I snap everything off.
I'm using a 95-125 pressure switch for the york.
I have a regulator on the air manifold to regulate down to 90 psi, then this selenoid has the switch to the dash. so it will pressurize the ARB.
watcha talkin bout willis?

i'm sorry kid, i meant to say they have both 1/8 and 1/4" NPT threads, depends what you get i have seen both. but they are obviously different sizes, you cant confuse them.
if its the 1/8" you can get a brass adapter from home depot.

Originally posted by kidwired
I have an arb selenoid and I'm trying to figure out how to tie it in to my OBA manifold. I was going to put it on a standard npt regulator, but it didnt want to thread easy. Are the threads something different? or should I just jam it?


It is *not* an NPT thread. It's 1/8" BSP (British Standard Pipe). This is a tapered thread and it is very close in size to 1/8" NPT. You can use 1/8" NPT with it and get it to seal without problem although it is a tight fit.

--Dan

That sounds more like it, sho don't feel like no NPT to me.

Like the other guy said, it's BSP. What I have found is that the male 1/8" bsp threads into 1/8" NPT kinda loose, so if you still have the little 1/8" bsp nips you could go into NPT with it. Check this company out, they should have what you need:

http://www.bsr-aerotek.com/adapters14.htm#bsp-npt

Auto meter sells a 1/8 BSP to 1/8 NPT adapter for fitting american oil pressure senders to Japanese engine blocks.......... Just FYI

the auto meter adapter is bspt, I dont know the difference but there is one

Kid,

I read the solenoid was BSP or BPT or whatever but that 1/8 NPT brass would cut threads into the aluminum housing.

I used a brass 1/8" NPT close nipple and threaded it in the supply side with a good dose of loktite 592 sealant and its not going anywhere. Ever.

Great Britain BSPP (British Standard Pipe Parallel)


BSP is the most popular thread end in Great Britain. These threads are either parallel (BSPP) or tapered (BSPT). The male BSPP will mate with a BSPP (parallel female or a female port). The male BSPT will mate with the BSPP female swivel. The male has straight threads and a 30-degree inverted seat. The BSPP female has straight threads and a 30-degree inverted seat. The female port has straight threads and spotface. The seal on the port is made with an "O" Ring or a soft metal washer on the male. The BSPP connector is similar to, but not interchangeable with our FPX. The thread pitch is different in most sizes, and the thread angle is 55-degrees instead of the 60-degree angle found on NPSM threads.



BSPT (British Standard Pipe Tapered)


The BSPT (tapered) male will mate with a BSPT (tapered) female and the BSPP female swivel. The BSPT male has tapered threads and a 30-degree inverted seat. The BSPT connector is similar to but not interchangeable with our MP. The thread pitch is different in most cases, and the thread angle is 55 degrees instead of the 60-degree angle found on NPTF threads. Neither the British parallel pipe or the British tapered pipe has true metric threads, although many people find these threads "foreign" and conclude they must be "metric."

I'm gonna try the auto meter thing tomorrow, w/ all the ricers it should be cheap and ez to find ;)

the BSP fitting did not work
I just ordered a BSPT /npt adapter from mcmaster.com for $5

I used a BSPT/NPT adapter on my ARB solenoids, works great. You got a better price than I did tho. Got mine through summit, the autometer ones, for I think about $11 each. Pricey little buggers.