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MarkusM 06-06-2012 07:06 PM

plumbing Catalina 27
1 Attachment(s)
Hello Everyone,

I am replumbing my Catalina 27 1974. Including updating from a direct discharge head to a holding tank.

I drew out a plumbing plan and Any input would be highly appreciated.
Also one thing I could not figure out was, do I need a vented loop between the waste pump and the thru hull for overboard discharge?

Thanks everyone in advance.


Gladrags1 06-07-2012 07:23 AM

Re: plumbing Catalina 27
4 Attachment(s)
Your plans look well thought out. As far as your question regarding the need for a vented loop between the macerator pump and the thru-hull, I don't believw one is ncessary. Here is a diagram of a typical sanitation plumbing system courtesy of West Marine Advisor.


Jetexas 06-07-2012 09:45 AM

Re: plumbing Catalina 27
Mine has a vented loop that comes off the toilet and then goes to a Y-valve that feeds either the holding tank or the through-hull.

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