Vacuflush problems!

What and where are the duckbills

I have a 1988 Sundancer the the head sucks all the time. I thought this was normal for an older boat. How do I check the duskbills? OR is this normal for a boat my age?

Thanks fo the help
 
Wetbar, the tech advised that the duckbills last approx two years and then get soft and release air, the valves are in the vaccum generator and seems to be an easy job. I went to Sealand website and printed out the manual for my model.
 
I cant find Sealand on goggle. What is the complete company name? EDIT - I found it thanks again
 
I'm glad I didn't know about this thread before I sold my 250. The vacu-flush head worked flawlessly for over 10 years, and hopefully still is.
 
Invention: Duckbill valve
Year 1998

Description
Invention patented by Robert Alfread Bennett on May 18th, 1998. Abstract: A duckbill valve is provided which includes a hollow cylindrical elastomeric body with first and second ends. The first end has walls parabolically tapering to an elongate slit, the slit being surrounded by an upper and lower lip. The second end has a non-uniformly round (e.g. oval) outer wall terminating in an open mouth. When inserted into a perfectly round apertured fitting, the non-uniformly round outer walled elastomeric body is bowed to form-fit the round configuration thereby forcing shut the lips and slit. Upon increased air pressure within the elastomeric body, the slit is forced open. In a second embodiment, the inner wall of the second end may be non-uniformly (e.g. oval) round. Insertion of a round tubular fitting within the non-round inner wall of the elastomeric body also achieves a bowed form-fit configuration which forces shut the lips and slit.
 
Can I have my "Duckbill" shirt now. Just got back from replacing my four duckbills. :smt038

Wasn't too bad of a job as I don't allow the duece in the boat, except for emergencies. :smt018

After I replaced the duckbills and reassembled the pump, I gave it the ol' testaroonie.

After the initial vaccum cycle, the pump cuts off approx. 35-40 seconds in between flushes. Does this sound about right. It is definately an improvement.

Thanks to Four Suns for the step-by-step how to on a prior post, w/out those directions, I would probably still be there figuring out how to replace the rear valves. :smt017
 
Can I have my "Duckbill" shirt now. Just got back from replacing my four duckbills. :smt038

Wasn't too bad of a job as I don't allow the duece in the boat, except for emergencies. :smt018

After I replaced the duckbills and reassembled the pump, I gave it the ol' testaroonie.

After the initial vaccum cycle, the pump cuts off approx. 35-40 seconds in between flushes. Does this sound about right. It is definately an improvement.

Thanks to Four Suns for the step-by-step how to on a prior post, w/out those directions, I would probably still be there figuring out how to replace the rear valves. :smt017
 
Can I have my "Duckbill" shirt now. Just got back from replacing my four duckbills. :smt038

Wasn't too bad of a job as I don't allow the duece in the boat, except for emergencies. :smt018

After I replaced the duckbills and reassembled the pump, I gave it the ol' testaroonie.

After the initial vaccum cycle, the pump cuts off approx. 35-40 seconds in between flushes. Does this sound about right. It is definately an improvement.

Thanks to Four Suns for the step-by-step how to on a prior post, w/out those directions, I would probably still be there figuring out how to replace the rear valves. :smt017
 
Luckydogs said:
After the initial vaccum cycle, the pump cuts off approx. 35-40 seconds in between flushes. Does this sound about right. It is definately an improvement.

That sounds correct. Mine takes this long to turn off after a flush.
 
TurtleTone said:
It's like those airline toilets, scares the hell out of first time flushers.

Hopefully. . that will discourage people from using it!

(my boat is more of a day boat. . .I tell people to take care of buisness before coming on the boat!)
 
If you really want tip top vacuflush performance, you can also change out the rubber seal on the toilet that the ball moves inside of when you flush. I changed mine out this year and it was a definite improvement on performance.
 
The duck bills weren't it....
Changed and no difference....So I got a spare set now!

So I then went back to ripping all apart - I was quite p*** at this point Saturday and was not giving up - disconnected all and just kept fishing and, well, now it works...put it all back together - and she seemed to work great...haven't given it a "sea trial" yet - but, in the water tests - it appeared to be good....
 
MY vac pump runs all the time. I repalced the duck bills. No luck! When I push the spring at the end of the tank the pump cuts off. So is that it? Do I need to replace the spring or what? What is that part called, just the pressure switch? Can I buy one at west marine or is it special order?
 
The switch and spring assy controls the vacuum pressure, as I recall. I would check the manual on this as I also had a similar problem 2 years ago and changed the spring setting so that it would create more vaccuum. (BTW, the switch wasn't the problem... let's just say that I ended-up placing a ptouch label on my head mirror with some basic instructions for use...).
 
so are you sayingI need change the springs and not the switch or is it all one kit? Where can I but it from?
 
I had to replace mine at only a year old... I found out the kids were putting their dental floss down the toilet and it bound up the bellows pump and had acted like a net catching stuff in the valves. Why do kids have to use 20 feet (literally) of floss per flossing? It was a nasty mess and I just replaced the stuff instead of "cleaning it" and hoping it was all ok.
Your kids were using dental floss? Bottle that shit!
 
10 year old thread gentlemen...
 

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