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Old 04-04-2014, 11:26 PM   #11 (permalink)
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Join Date: Oct 2007
Location: Plattsburgh, NY

Most 4-ways only have 3 barbs. The center is typically the input, output on either side, and vents on the outside of the outputs (end of the 4-way body on a cocker switch).

I haven't had any experience with them personally, but I believe that the Palmer 4-ways are rated for the pressure, or were made that way at one point. Early generation Cockers were made without an LPR, so they are definitely out there.
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