BSP pipe sizes.

No, for several reasons.

The first is that no part of a 3/8 BSP thread is actually 3/8ths of an inch in diameter. The name comes from the inner diameter of malleable-iron Victorian gas pipe that would have that thread cut on the outside, so you can't use it for anything sensible. Nowadays the 3/8, 1.5, etc are officially just names and the actual corresponding sizes are specified in millimetres in a table, which you can look up by googling if you need to know.

The second reason is that you can't just jam a bit of tube into a threaded fitting and expect anything useful to happen! If you have to use copper tube then a compression fitting is probably sensible, though there are other possibilities. Either a separate fitting with a thread to screw into the valve, or you might find a valve with compression fittings built in.

Pete
 
Now I'm even more puzzled. Are you trying to screw onto a threaded fitting or connect to copper tube?

Either way, the fitting you linked to is UNF, not BSP.

Pete
 
superheat6k said:
Use 3/8" copper OD to BSP thread to suit your ball valve, e.g. 1/4", "Stud fittings". 3/8" OD pipe will be about or just over 1/4" ID.
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I'm still not clear.

I have a run of 3/8ths OD copper pipe from wing tanks to main tanks and want a compression fitting ball valve to fit along that run of pipe so I can open it and dump the contents of the wing tank into the main tank when I want to.

So, I need a ball valve that will fit in the middle of a run of 3/8ths OD copper pipe.
 
burgundyben said:
I'm still not clear.

I have a run of 3/8ths OD copper pipe from wing tanks to main tanks and want a compression fitting ball valve to fit along that run of pipe so I can open it and dump the contents of the wing tank into the main tank when I want to.

So, I need a ball valve that will fit in the middle of a run of 3/8ths OD copper pipe.
Click to expand...
2 x stud fitting 3/8" pipe to 3/8" BSPM or BSPTM
1 x Ball Vv 3/8" with female ports

Likely got these in my workshop if you can wait until Friday.
 
burgundyben said:
So, I need a ball valve that will fit in the middle of a run of 3/8ths OD copper pipe.
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Why didn't you say so then, instead of muddying the water with BSP threads and tank fittings?

You need one of these: http://www.asap-supplies.com/foot-mounted-gas-compression-ball-valve-307033

307033_3_zpssazcz6ck.jpg



Pete
 
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Why didn't you say so then, instead of muddying the water with BSP threads and tank fittings?

You need one of these: http://www.asap-supplies.com/foot-m...r use with Diesel? Or am I missing the point!
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Surfacesub said:
I would be interested to know how you have established the seals in the Bullfinch Gas valve are also suitable for use with Diesel? Or am I missing the point!
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Read the product description, it says suitable for diesel, although I would still use the lever ball valve originally shown.
 
aquapower said:
Read the product description, it says suitable for diesel, although I would still use the lever ball valve originally shown.
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Point taken I read the BSI No. which only refers to Gas. Delved a bit deeper and as you say body and seals OK.

Excuse me Sub, that wasn't my post!
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Sorry PCUK, haven't used the Quote feature much before. Now discovered how it happened, all good for the learning curve!
 
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