Just to be sure we are all on the same page, this thread is titled Weight Distribution Hitch. The posts have morphed into a discussion of sway control. These are not the same thing!
As its name suggests, the purpose of a weight distributing hitch is to move some of the trailer's hitch weight off the ball, and off the rear suspension of the tow vehicle. None of this will have any effect on sway.
You can also buy a friction sway control apparatus (Reese is the most common). It is not expensive (and not very effective), and it has nothing to do with weight distribution.
Finally, you can buy a weight distributing hitch that ALSO has a sway control function. The extra function costs extra money, often substantial, as you would expect. And the specs and advertising for that particular hitch will make it clear that it has an anti-sway capability.
Bill
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