Thru hull valve size?

Sep 25, 2008
464
Catalina 30 MKIII Varuna Boat Club
Hi all,
Can't get down to the boat until late next week and need to order the thru-hull ball valve for my macerator. I have a '97 MKIII. Does anyone know for sure, what size valve I need? Is it 1/2" or 3/4"?
Thanks
 
May 20, 2016
3,015
Catalina 36 MK1 94 Everett, WA
The 36’s have a 1” valve if I remember correctly. Should be the same across the line. On exception being earlier boats with direct discharge( no macerated) which I believe is 1.5 or 2”
 
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Sep 25, 2008
464
Catalina 30 MKIII Varuna Boat Club
Hi all,
Can't get down to the boat until late next week and need to order the thru-hull ball valve for my macerator. I have a '97 MKIII. Does anyone know for sure, what size valve I need? Is it 1/2" or 3/4"?
Thanks
Thank you much.
 

Ward H

.
Nov 7, 2011
3,782
Catalina 30 Mk II Cedar Creek, Bayville NJ
Hi Ralph, The macerator discharge thru hull on my 93 Mk II is 3/4”.
 
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jssailem

SBO Weather and Forecasting Forum Jim & John
Oct 22, 2014
23,122
CAL 35 Cruiser #21 moored EVERETT WA
@rpell1@msn.com
Perhaps this might help. I found this for the Mark 1.
Circa 1980 Parts Manual

This parts manual should cover most Mark I C30s built 1974-85. The rigging and gear illustrations are helpful for any upgrades. Hopefully we will obtain similar document for the Marl II and III later models. Contributions gladly accepted!