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So I picked up a thru hull intake from west marine that is NPS threads, then decided it would be best to get the "combination thread" fitting from wakemakers as I would be putting a NPT thread ball valve on the end. Allegedly the "combination thread" fitting is suppose to have NPT thread on the very end (or modified to accept a female NPT thread better than straight NPS).
I recieve the "combination thread" thru hull and to my dis-may the ball valve doesnt thread onto it any further than it did on the NPS thru hull. Is this normal?
The threads on the 2 different thru hulls look exactly the same, I have seen some pictures online of the combination thread and there is a distinct difference in the way they looked.
Anyone who can shed some light on this would be appreciated.
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Threaded Mode