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Thread of screw in CO2 bubble counter

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Hello all,

I am looking at getting all parts together for DIY CO2 regulator in Australia. I have sourced details of most of the parts required except bubble counter. I am struggling to find thread size for screw in style bubble counter. Can anyone help me with it? Thank you
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Premium Member
3,075 Posts
most on ebay are good for 1/8 npt thread. and also good for 1/8 bspt thread, because the female threaded port is coarse enough to accommodate both standard. There is an oring put between the two connected parts to seal, you can use teflon tape on the thread also, but oring is better.
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