The only thing that could do that is the vented loops. I have one
at the exit if the head, another at the exit of the LectraSan. Both
are about 3-4' higher than the base. Strange thing is that this setup
worked flawlessly for 2 years then all of a sudden started acting up.

Last time I rebuilt it, I checked and cleaned every mating surface
where new gaskets went. Still no luck.

Doug
s/v Callista
"Peggie Hall" wrote in message
...
Doug Dotson wrote:
I have 2 Groco Type K heads. One has worked very well, the
other has become the bain of my existence. I have gone through
3 rebuild kits and it still has problems. I flush and after a short time
water bubbles back up into the bowl. Funny thing is that it worked
perfectly for 2 years then all of a sudden this problem popped
up.

If you mean that waste or flushwater is backing up into the bowl, I
don't think the toilet is the source of your problem, Doug...I'd bet the
problem is downstream of the toilet...something is creating backpressure.






Doug
s/v Callista

"Stephen Trapani" wrote in message
...

So, thanks to the descriptions you all gave me of having to remount a
new toilet and thanks to the chance of saving money, I'm enquiring on if
I can repair the toilet I have. It's a Groco Type K, I can't find any
other numbers or model name other parts numbers on the handle and such.
Anyway, I took off the little backing plate on the back of the toilet
near the bottom with the water intake nipple. Under it is a flat piece
of rubber about 2"X3." It has a flap cut into the middle it with square
piece of flat metal attached to it. Is this the joker valve? The metal
piece contacts the internal portion of the foot pedal.

Just above the metal piece attached to the flat rubber is a tear in the
rubber. Should I fix this? How do I do so? Can I get a replacement part?
Does this make enough sense for anyone to have any ideas about what I
should do?

Thanks,

Stephen





--
Peggie
----------
Peggie Hall
Specializing in marine sanitation since 1987
Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
Other Sources of Aggravation and Odor"
http://69.20.93.241/store/customer/p...40&cat=&page=1
http://shop.sailboatowners.com/detai...=400&group=327