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Old 12-21-2014, 11:21 PM   #1
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'65 Caravel dump valve replacement

all of a sudden my 1965 caravel dump valve started leaking. i poured water down the toilet and it came dripping out of the dump valve fairly significantly. i am pretty sure that it is seated well and that no paper is preventing it closing.
i have no idea when it was last replaced so i think that it may be time to do it.
firstly i would like to hear from someone who has maybe done it for their experience. secondly i am not sure which one to get. it is confusing when i look at what is available to know which is the correct one.
here is a photo of the one that is there presently. you can see that i have pulled down the bellypan to get the photo.
any words of wisdom would be appreciated.
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Old 12-22-2014, 04:53 PM   #2
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I'm interested to hear what sort of replies you get. I would be VERY sure it's not just something jamming it up.
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Old 12-22-2014, 05:39 PM   #3
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First, even though you think the valve is seated, open it, then close it. Fill the tank with water, then drain. Now add some water to the tank and see if it still drips.


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Old 12-22-2014, 05:50 PM   #4
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If it still drips, get a bottle of Thetford Toilet Seal at your local RV supply and put about 1/4 of the bottle down the through the toilet and into the valve opening. You should be able to see the opening in the bottom of the holding tank through the bottom of the toilet when in the flush position. This stuff has worked on the toilet seals on both of our trailers. It is sure worth a try on the dump valve as replacement is not real easy and may not be necessary.


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Old 12-23-2014, 09:35 AM   #5
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thanks

thanks for input.
i bought the conditioning fluid and using a long funnel put it on the valve this morning. i put a catch bucket underneath to retrieve the fluid so that tonight i can do it again after opening and closing the valve.
had to go to work so i will see what happens later and report back to yall.
thanks very much for information.
kevin
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Old 12-23-2014, 11:07 AM   #6
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Certainly worth a try. Hope it does the job.


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Old 12-23-2014, 12:25 PM   #7
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vts has rebuild kit for grentec valves , not a difficult job . most likely seals rotted an pieces finally falling out .
big problem is getting mounting bolts out of flange without damage to flanges.
remove dump station from trlr and do on bench . take clamps off tank outage and wiggle dump station back and forth while pulling out , a bear but will come out . then on bench you can hack saw the rusted bolts off remove ,rebuild and reinstall .
I use dicor lap sealant for the outage seal job work real well ( messy , mineral spirits for clean up ) new clamps .
once you have apart is simple matter to get rest of 1/4" mounting screws out with vise grips . hope this helps
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Old 12-24-2014, 01:46 PM   #8
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unfortunately toilet seal didnt do the job. i was hopeful but realistically knew that i was probably facing a valve replacement. i am going camping this coming weeked (with a bucket under the caravel !!) and will start replacement in new year. i will document and post for others in the future.
thanks for everyones help.
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Old 12-24-2014, 02:53 PM   #9
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Originally Posted by kevinkatz View Post
unfortunately toilet seal didnt do the job. i was hopeful but realistically knew that i was probably facing a valve replacement. i am going camping this coming weeked (with a bucket under the caravel !!) and will start replacement in new year. i will document and post for others in the future.
thanks for everyones help.
Sorry to hear it, but the write up will be really helpful at least, so thanks! Take lots of pictures!
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