A 4 inch long nipple works best . 2 1/2 to 3 inches protruding on the inside , the rest on the outside. Just make sure you have enough of the unthreaded part of the nipple sticking out on the outside to make the necessary sized fillet weld.
I have a confuseing issue with the K-350 blueprints. On blueprint number 4 the cabin flood nipple it says 2"x3" XXH pipe nipple, but blueprint number 13 says is a 2"x4" sched 80. I am confuesd what I need to use for the cabin flood nipple. I think the sched 80 will work just fine, but maby there is something I am overlooking. Anyone know what needs to be used?
Thanks, Scott Waters
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