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Old 01-08-2020, 14:08   #1
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Through hull or skin fitting measurements

I have been taught to measure the size of a male filling across the threads and a female fitting by internal diameter.

In the chandlers I picked up a marked 11/4 Male fitting but when I measured it it was 1 5/8 and this difference was apparent on other fittings.

What am I missing here? I want to measure the skin fittings on the yacht and then buy them on line but how do I get the right size?

Mark
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Old 01-08-2020, 15:05   #2
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Re: Through hull or skin fitting measurements

You have another step after measuring. You must look up the measurement in this table to convert to nominal pipe size. Hint: Pipe size is theoretically the I.D. of a length of pipe-not the fitting. / Len


https://www.plumbingsupply.com/pipethreadsizing.html
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Old 01-08-2020, 15:12   #3
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Re: Through hull or skin fitting measurements

Proper thruhull instructions.


https://marinehowto.com/category/plumbing/
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