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Old 20-11-2019, 18:10   #1
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Marelon 1 1/2" through hull fitting

Does anybody know the size of the nut on these fittings?
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Old 25-11-2019, 05:34   #2
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Re: Marelon 1 1/2" through hull fitting

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Does anybody know the size of the nut on these fittings?

I think for through hulls you need one of these.
https://www.ebay.com.au/itm/Adjustab...QAAOSw6eJdHUFn
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Old 25-11-2019, 05:59   #3
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Re: Marelon 1 1/2" through hull fitting

The thread is 1.5" npt parallel not tapered.
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Old 25-11-2019, 06:54   #4
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Re: Marelon 1 1/2" through hull fitting

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The thread is 1.5" npt parallel not tapered.


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Old 25-11-2019, 08:24   #5
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Re: Marelon 1 1/2" through hull fitting

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Thanks to all for the info. I am wondering about the dimensions of the nut itself. I know most people use an adjustable wrench to loosen the nut. Because of the location of the fittings I would like to get a suitable sized deep socket to loosen the nut.

I already have the tool to twist the fitting from the outlet side.
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Old 25-11-2019, 10:57   #6
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Re: Marelon 1 1/2" through hull fitting

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Originally Posted by Tmacmi View Post
Thanks to all for the info. I am wondering about the dimensions of the nut itself. I know most people use an adjustable wrench to loosen the nut. Because of the location of the fittings I would like to get a suitable sized deep socket to loosen the nut.

I already have the tool to twist the fitting from the outlet side.
Cant help you on the dimension of the flats on the nut, but if you're having trouble fitting a crescent wrench on because of clearance issues try a large size basin wrench.
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Old 25-11-2019, 11:01   #7
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Re: Marelon 1 1/2" through hull fitting

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You are correct of course, but the reason I stated it the way I did is that's how it's described in the Forespar catalogue.
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Old 26-11-2019, 08:16   #8
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Re: Marelon 1 1/2" through hull fitting

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Cant help you on the dimension of the flats on the nut, but if you're having trouble fitting a crescent wrench on because of clearance issues try a large size basin wrench.
That's a good plan. Thank you.
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