Self-aligning tank fittings are ideal for cone bottom and dome top tanks because they enable the port to be swiveled up to 27º. To accommodate the swiveling action the hole size required is one size larger than the connection size. Self-aligning tank fittings are available in 1" - 3" sizes and made of PVC with either EPDM or FPM gasket seals. As with all of our bulkhead fittings, they have left-hand buttress threads to protect against unscrewing and blowout.
The body and gasket are installed on the inside of the tank and the nut is tightened while holding the body. The nut can be tightened from the outside of the tank by holding the flats on the body end while turning the nut.
When using the threaded configuration, wrap the threads with PTFE tape in a clockwise direction beginning at the first or second full thread. The threading should be "hand tight", perhaps using a strap wrench only for an additional ½ to 1½ turns past "hand tight".
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