Originally posted by mpm
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the difference is the wear and tear factor. when the 3/8'' wears the rotating head as it drags and rotates, the entire unit is pretty much history. the 1/2'' has a wear ring on the body. the rotating head doesn't really get the wear and tear dragging abuse.
i use both my 1/2'' and 3/8''. the 1/2'' has moire time on it with less physical wear on the head.
also the 1/2'' is capable of more flow.
rick.
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