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|  thru hull fittings 
			
			anyone knows why the ABYC  does not recommend this fitting for below waterline fitting  http://www.perko.com/images/catalog/...Fig%200333.jpg I'm replacing all my bilge pump thru hull fittings with s/s and the below water fittings with the above item along with the scupper item below http://www.perko.com/images/catalog/...Fig%200285.jpg thanks jet   | 
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