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Old 08-10-2015, 08:12 AM   #1
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"Leftovers" in between shutoff valve and cap after dumping tanks?

Hi everyone,
We are having an issue where we always seem to have a "leftover" discharge of our tanks between the shut off valve and sewer cap after dumping our tanks in our 29.5 BHDS. I am pretty sure we are doing everything correctly but we always experience about a 1/2 gallon (or less) of nasty stuff every time we remove the cap after traveling to hook up at a new site.

Any thoughts and/or tips to prevent this? Are we doing something wrong?

Love this forum...thanks in advance for all your responses.

Steve
Ottawa, Canada
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Old 08-10-2015, 08:15 AM   #2
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My trailer did the same thing. I'm guessing it's residual from the last trip. But what I can't understand is how? The valves are closed.
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Old 08-10-2015, 08:20 AM   #3
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I typically get about a cup of grey/black water trapped behind the cap between outings. A gallon seems excessive. If you have time at the dump station or at a site with full hook ups, I'd try blocking up the door side of the TT so you get better drain toward the sewer side. You can also try a flush wand or back flusher to make sure there isn't any debris keeping one of the valves from completely closing. There is also a chance that one of the valves just leaks a bit more that it should.
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Old 08-10-2015, 08:20 AM   #4
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Sounds like the valve leaks. Could be debris preventing a good seal or a defective valve. Do you flush the tank after dumping? If you are in warranty a visit to the dealer might be in order. I Keep a box oh disposable gloves for setting up the sewer and dumping.
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Old 08-10-2015, 08:30 AM   #5
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We use one of these, so that we don't have to worry about that.
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Old 08-10-2015, 08:45 AM   #6
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I'll just get my wife to take the cap off for now on!
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Old 08-10-2015, 09:00 AM   #7
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ok - might not be quite 1/2 a gallon but it just feels like a lot when its nasty
I will try flushing it with some water to see if its the valve that leaks and i will look into that "twist valve".
If all else fails...I will make sure to get my wife some really good rubber gloves :P
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Old 08-10-2015, 09:06 AM   #8
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Quote:
Originally Posted by TWP723 View Post
I'll just get my wife to take the cap off for now on!
lol
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Old 08-10-2015, 09:14 AM   #9
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I am in agreement that you most likely have a leaky valve.. Couple of things that might help besides the obvious (change out valve). Is that when you go to dump bring a leveling board and roll up on it on your other side to put your TT at a slight tilt towards the dump side. This will help in removing more of what is left in the bottom of your tank. Also the item that JASONCW linked to is a great alternative if you don't want to get into changing out your existing equipment right now.
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Old 08-10-2015, 10:50 AM   #10
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Quote:
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I'll just get my wife to take the cap off for now on!
Yeah, I can see that not even working once. She knows what comes out the black pipe
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