Thru hull valve size?

[rpell1@msn.com]

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

 

[Peggie Hall HeadMistress]

Jabsco Macerator pump has a 1.5" inlet and a 1" discharge. You'll find plumbing instructions on page 2 of the owners manual Jabsco Macerator Pump owner manual

--Peggie

 

[LeslieTroyer]

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”

 

[rpell1@msn.com]

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.

 

[rpell1@msn.com]

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”

Thank you much.

 

[Ward H]

Hi Ralph, The macerator discharge thru hull on my 93 Mk II is 3/4”.

 

[jssailem]

@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!

https://catalina30.com/TechLib/PartsManual/Systems.pdf