Pipe thread depth

What the hose is it? E.g pvc, PE,... and what kind of connection between the brass pipe and the hose?

If you only concern the connection between the vessel and brass 1/8" pipe, you should braze.

I agree with brazing the fitting to the vessel. would be easier than to the pipe directly. Or braze the threads to the vessel and insert the fitting.

Much easier and cheaper than thickening the walls.

Standard thread engagement for 1/8" NPT is 0.264" to ensure sealing.

Dear Mr.Thor,

1/8" NPT requires thread depth of min. 3/8" and max. 1/2" depth. Hence you may need to put around 1/2" to 5/8" wall thk.

Best Regards

BOC Reddy

Yes, Better braze a piece to the end an that's it.

braze a pipe nipple to the item

Its unusual for copper to be used as a pressure vessel in square configuration is strange

I would be careful Making penitrations into this vessel, brazing will anneal the copperDo you feel safe with this item?? you did not say what the wall thicknes is.

80 psi ... I say .25 tap then solder to seal.

Install the boss on the inside of the vessel. There are also fittings called nutserts that can be install (crimped) onto sheet metal of various thicknesses with the threads then being internal. They are generally steel. Maybe they are available in copper or brass which could allow you the solder or braze.