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GeminiCool · 04-03-2002, 10:33 AM

Hey Haddy,

Well the NPT thread, as you know, is tapered. So the 1st thing to know is how far down you must screw the fitting before it begins to engage the thread.

On our tops, the engagement is very deep so that the fittings sit squarely on the top AND so that people don't over tighten the fittings and lift the top.

I have experimented with several leaking proofing items. IMO the good old pipe tape is the best. Simply make a few extra wraps to help 'tighten' up the thread a bit. If the threads are at the proper depth, one or two wraps makes a seal that can't be turned by hand.

One last tip is to NEVER put the tubing on dry and NEVER turn the tubing CCW when pushing it on. Wet the end and it will slide on easily.

Hope that helps.

04-03-2002, 10:33 AM	#33
GeminiCool Cooling Neophyte Join Date: Mar 2002 Posts: 20	Hey Haddy, Well the NPT thread, as you know, is tapered. So the 1st thing to know is how far down you must screw the fitting before it begins to engage the thread. On our tops, the engagement is very deep so that the fittings sit squarely on the top AND so that people don't over tighten the fittings and lift the top. I have experimented with several leaking proofing items. IMO the good old pipe tape is the best. Simply make a few extra wraps to help 'tighten' up the thread a bit. If the threads are at the proper depth, one or two wraps makes a seal that can't be turned by hand. One last tip is to NEVER put the tubing on dry and NEVER turn the tubing CCW when pushing it on. Wet the end and it will slide on easily. Hope that helps.