I would like to now change the the threads attached to the fittings as i have been encountering numerous problems trying to fit 3/16"*14" which has been failing to clamp down and resistant to flow coz 1/4 * 3/8 doesn't fit in the ferrule nut.
Can anyone out there please advice me on how to deal with this? I have conducted website research on the topicbut that didn't amount to much.
In your case it won't be wise to buy a more expensive pump. I suppose that what you are running is a "3/16 x 1/4" tubing. Its very unfortunate that you are unable to get the " 1/4x5/16" tubing coz that would have been the most suitable one here.
I advice that you fit the tape attachment on a lathe but don't expect it to be easy.