Originally Posted by Poobah58
Element (straight thread) won't screw into the back end of thread as previously stated. Do you plan to re-thread? Not gonna be easy!
This is correct. However, it shouldn't be too difficult to rethread this. I've done it before for other applications. What size is it? 1"?
Of course buying a large NPT tap would defeat the purpose of your lower cost design....
Please confirm the size you need and I might have a tap you can borrow. I'll have to check in my shop on Monday. I have several large NPT taps.
You'll need a strong vise and some anti-seize paste. When your done, you won't have as much thread sealing ability since you'll be overriding the original taper of the fitting. But in this low pressure, low temp application, you should have no trouble getting a seal with some good quality PTFE tape.