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Sapperwhite & all:
Yep, I checked last night, and it is a Wilcox Crittenden RH Head Mate 90 model number 37001. So it might be original. There is no anti-syphon valve in the water inlet path at all. The hose goes from the seacock and loops up to just under the deck and back down to the pump assembly. With both the seacock open and the blue tipped flush water supply lever up, no water pumps into the bowl. Sounds like I am just pumping air. If I pour water into the bowl, and pump the black handle it will flush, but then I hear escaping air / girgling which might be a bad seal or plugged vent line. Sounds like I have at least a clog or bad seals on the intake side, and possibly a plugged vent or bad seals on the flush side. I have had the boat for 4 years now, and have never rebuilt the head, so it might be worth getting the entire $80 kit and doing it, since there is no mention in my service records of any of the previous owners ever repairing the head.
The hoses might be original as well, and I wonder what modern brands / type of sanitation hose should be used these days?
I wonder if I should add the anti-syphon valve at the top of the intake loop as shown in the installation manual you sent? Is that recommended these days on the intake side before the pump?
Is a separate intake strainer for the head also considered a must have? I guess it makes sense if I have one for the raw water intake on the engine. Same concerns. Hmmmm.
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1980 Pacific Seacraft Orion 27
Sailing Grounds: Southern California
Last edited by LittleWingCA; 09-16-2010 at 03:17 PM.