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so im about to weld up all the fittings in my tanks. whats funny is acs doesnt give the outside thread on the reducer bushing for the flop tube, so how do you know which weld in bung to get? its prolly either 3/4 or 1 inch. i need 2 flop tubes, one 9" for my header tank and one 10" for my smoke tank. next question is, why the rather large price gap in these 2 parts? it says you need the pricey one for the 9-12" flop tubes...... acs wasnt any help so far.......
http://www.aircraftspruce.com/catalog/appages/putubeadp.php
http://www.aircraftspruce.com/catalog/appages/putubeadp.php