Odor from my toilet / holding tank

wipe superlube grease on the gasket every 3 months (where the ball opens, with the ball open) as Sealand recommends it and it helps the gasket seal and keeps it lubricated.

Aaacckk

And man you better mark THAT toothbrush in such a way that there is NO doubt what it is for............

Some good advice and bad advice here.... Yes metal lines could be used, but you need to be very specific about the alloys used. Some of the stainless alloys are okay, and Monel is fairly good too, but the problem occurs two fold: welded tanks always have problems at the weld first. This is because the metallurgical qualities of the material change somewhat when welded. The second problem is whether the urine is mixed with a number of other components, including seawater, which obviously has a sodium content. Unfortunately, it has more than salt content. Those familiar with drinking water treatment regimens would remember the trihalomethane problems, when chlorine is introduced to organic material, and the issues that result. The same is true in sewage treatment, since the rinse water source could contain a whole host of other contaminants.

I generally recommend plastic tanks and modern sanitation hose for boats under fifty feet. Larger boats need a more comprehensive study of what kind of system is going to be installed and what materials are the best choice.

Here is an excellent site on corrosion resistance from the chemical industry. It has a pretty good list of metal and plastic corrosion data:

http://www.nibco.com/assets/ChemGuide.pdf

Long story short, your classic Chris Craft should probably have a new plastic tank and some good quality modern sanitation hose installed. All in all a reasonably simple and inexpensive fix.

Does anybody else have her email?

I do have her email but i would suggest you post on the trawler forum she monitors it . Sounds like you found the problem but now you have the bilge full of it That sucks .