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Old 02-22-2016, 06:56 AM   #1
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1967 17' Caravel
Houston , Texas
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Newbie Question on How to Drain Black Tank

We recently bought a 1967 Caravel that we are looking forward to restoring for my hubby's retirement project. Problem is.... we cannot figure out how to dump the black water tank so are very hesitant to use the toilet. We put water and chemical in the tank but cannot figure out how to let it out and rinse it. See the coupling and the line, but what opens the valve. The manual says "open the gate valve to drain", but where the heck is the gate valve??
There is nothing under the trailer near the hookup and we can't see anything in the bathroom.

Thanks for any help.
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Old 02-22-2016, 12:07 PM   #2
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If your trailer had a bumper compartment, there might be a valve in there.
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Old 02-22-2016, 12:25 PM   #3
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The gate valve is probably hidden inside the skin not too far from the sewer discharge outlet. Somewhere nearby should be a small T handle which you pull to open the valve. Look around the bumper storage and bottom of left rear of the trailer.
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Old 02-22-2016, 12:26 PM   #4
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1967 17' Caravel
1968 22' Safari
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Black tank dump valve

Your black tank dump valve is in the rear bumper access compartment on the toilet side of the compartment. If you click on my images you will see pics of my 67 Caravel black tank repair. These pics should give you the info you need. Also when you do go to dump your black tank PUT A RUBBER PLUG IN THE SHOWER PAN FIRST!!!!!!. I found out about the rubber plug the hard way when black water run up into the shower pan on my first dump.
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Old 02-22-2016, 09:11 PM   #5
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1967 17' Caravel
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Took us two months before we saw the bumper compartment and had a good laugh at our discovery. Can't wait to check in the morning and see if we can find the T pull in that compartment too! Thanks for the heads up on the rubber plug for the shower!!

JH
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Old 02-23-2016, 04:16 PM   #6
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Post a picture? Should be there.
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Old 02-23-2016, 09:01 PM   #7
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1967 17' Caravel
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Darn Gate Valve

Looked in the bumper compartment , but alas, no valve. Still do not see anything remotely looking like some pull on a gate valve. Will take some pictures tomorrow and post.... I know it is there somewhere , but .......
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Old 02-23-2016, 09:36 PM   #8
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1967 17' Caravel
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Black tank dump valve handle

Took a picture of my pull handle on my 67 Caravel. Mine was missing so I had to fabricate one. I made mine out of a pc. of 1/4" copper tubing with a tee soldered on the end for a pull handle. The other end is connected to the dump valve with a cotter pin.
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Old 02-26-2016, 12:06 PM   #9
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1967 17' Caravel
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Mystery Solved!

Thanks everyone as I finally found that blasted valve. I had to get on my knees and REALLY look past the mud dabber nest , but low and behold, it was there and it worked.. Got the tank drained and cleaned out and Gary only fainted once and threw up twice. He's a whoosie though!

Thanks Again! Joanie and Gary
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