[C320-list] head thru hull

[Kirk McCullough]

Hi Darrell

I had a similar problem with the macerater discharge valve. Problem was I 
waited too long to replace it as it got harder and harder to open & close. 
While at sea, 2 hours from the closest port, the handle broke off in my 
hand, which caused the valve stem to crack and allow water in. We shipped 
about 60 gallons of water before I had the valve wrapped in enough dish 
towels and duct tape to stem the flow enough for the bilge pump to keep up. 
We got dockside safely and did a temporary repair and order a new Marelon 
valve. I changed it at my next haul out.

The size is stated in the manual in plumping diagram, I don't recall if its 
1.25 or 1.5", but Forespar Marine products carries the exact replacement. I 
removed the 4 ss screws that hold the valve on and screwed on the new valve. 
It was simple enough and now I pay much more attention to the way all the 
Marelon valves are working. I order some spares to cover all the different 
types we have on board, some 90 angle, straight through etc.

Kirk McCullough

Boomernang #124
----- Original Message ----- 
From: "Darrell" <dgray at n-sea.org>
To: "C320-List" <c320-list at catalina320.com>
Sent: Monday, January 08, 2007 6:51 AM
Subject: [C320-list] head thru hull


>I have a 1994 C320 hull # 88. For the past few years, my direct overboard 
>thru hull valve for the head , has got harder and harder to turn to the 
>point you are pretty sure you are going to break the handle off, I have 
>tried lubing it on 2 occasions when I have had the boat out of the water 
>with little result. This year I just plan to lift the boat and pressure 
>wash it while it the slings, replace zincs and drop it right back in the 
>water. I thought I would also replace this valve. Using a tape measure and 
>a flash light, the outside diameter of the thru hull tread appears to be 
>about 2 inches. I am assuming the thru hull diameter is 1 1/2 : like the 
>rest of the head plumbing. When I went to west marine to by a replacement 
>valve they were also certain it was a 1/1/2 " thru hull so I bought a 1 
>1/2" marlon valve that has a female thread of just under 2 ". Because I 
>only have a few hours in the sling, I would like to confirm with any other 
>owners that may have replaced this valve that I  have the right part. Any 
>help would be greatly appreciated. On another note, I am just replacing 
>all my head hoses and must say I am not to impressed with the original 
>Catalina installation, with one elbow and a different y valve, I was able 
>to eliminate about 5 feet of 1 1/2 hose. Also the vent hose fitting on the 
>holding tank is 3/4, while the actual vent is 1/2 inch. I am also replacing 
>the head as the pump has a small crack and is leaking. The new head has a 
>hose going directly from the top of the pump to the back of the bowl. My 
>original toilet has as hose leaving the top of the pump going through the 
>wall behind the head and another one returning to the back of the bowl. At 
>first I thought this was just a big loop, but while scratching my arms all 
>up on the rough fiberglass behind the cabinet it appears this isn't the 
>case. I am planning to remove the toilet paper holder so I might see what 
>is going on back there better. Again if anyone who has encountered this 
>could enlighten me as to what is going on back there , I would greatly 
>appreciate it. Don't get me wrong, I love the boat , I am just tired of 
>coming home itchy and smelling like crap, Darrell
>
>
>
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