Can anyone identify the size of this thru hull?

kalanka

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I want to replace the thru hull fitting and strainer on a 1988 Sadler 34. The strainer is a Guidi Terrreno which sells in sizes (BSP?) from 3/8 to 3/4 inch.

It is very hard to access the location to measure but I would like to source the right size of thru hull and strainer. Boat is currently afloat but will be dried out pre-season

Can anyone make an informed guess as to the sizes shown in these photos?

Thanks
 

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vyv_cox

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Where is the fitting? On my 34 all seacocks are 3/4 inch except the toilet discharge, 1.5 inch. The original Bukh 20 used a 1/2 inch coolant seacock but I changed that for 3/4 inch when I replaced it with a Yanmar.
 

VicS

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measure the OD of the threaded section with calipers. No need for digital vernier type . These'll do. The outlet hose tail should be the same size and may be more accessible.

1707512214301.png ...........................subtract ¼" and you will be close to the BSP size. Alternatively look it up in Zeus https://www.moonshiners.org.uk/MZ/zeus.pdf



or on line thread tables

or here
1707513710537.png
 
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