3/8 npt to 5/8 barb - Page 2 - SailNet Community
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post #11 of 17 Old 05-03-2013
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Re: 3/8 npt to 5/8 barb

Just went thru that same thing and finally found the part at Hamilton marine ,ordered it online had it in a few days. They had all sorts of brass adapters
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post #12 of 17 Old 05-03-2013 Thread Starter
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Re: 3/8 npt to 5/8 barb

yeah, hamilton is one of the first sites i checked. but being that i need these for the raw water pump, i'm avoiding brass.
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post #13 of 17 Old 05-03-2013
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Re: 3/8 npt to 5/8 barb

Ours was for a bilge pump
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post #14 of 17 Old 05-03-2013
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Re: 3/8 npt to 5/8 barb

Looks like the OD of your 3/8th pipe thread is the same OD as your 5/8th barb. So a 3/8th pipe nipple with grooves ground in one end should do the trick.

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post #15 of 17 Old 05-03-2013
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Re: 3/8 npt to 5/8 barb

I thought one should not use brass with salt water. Use bronze with salt water or plastic.
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post #16 of 17 Old 05-03-2013
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Re: 3/8 npt to 5/8 barb

I have been using type 316 stainless for 40 years, with no problem.

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post #17 of 17 Old 05-03-2013
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Re: 3/8 npt to 5/8 barb

3/8 NPT is 0.675 inch OD. That's just a little larger than 5/8". If I could find a bronze 3/8 NPT nipple, I'd just slide the hose on and double clamp it.
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