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07-10-2017, 06:21 AM
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#1
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Junior Member
Join Date: May 2017
Location: Ohio
Posts: 9
SUN #9300
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Black tank will not empty
Hello all. Im kinda new here and have a Sunline 2363. I cannot get my black tank to empty. seems like this should be a pretty straight-forward job. Any ideas on possible issues. the idea of opening the valve and sticking a wire up thru does not seem like a good one. lol
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07-10-2017, 07:54 AM
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#2
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Senior Member
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
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Plenty of water in the tank?
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07-10-2017, 08:19 AM
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#3
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Junior Member
Join Date: May 2017
Location: Ohio
Posts: 9
SUN #9300
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it almost full to toilet. lots of water
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07-10-2017, 09:57 AM
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#4
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Senior Member
Join Date: Apr 2016
Location: Maryland
Posts: 488
SUN #8237
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Might want to try opening the dump valve with the flush valve in the toilet open. If it flows like that you have a clogged black tank vent.
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John
2000 T2370
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07-10-2017, 11:20 AM
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#5
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Senior Member
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
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A 3" pipe is real hard to block you are sure you are opening the right valve? They is a possibility the rod is moving and the gate is not.
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07-10-2017, 11:54 AM
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#6
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Junior Member
Join Date: May 2017
Location: Ohio
Posts: 9
SUN #9300
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I only see 2 valves. when I pull the first one the grey tank drains. when I pull the other nothing but maybe a little dribble. it is possible the gate is not moving but how do I check with a full tank?
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07-10-2017, 03:38 PM
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#7
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Senior Member
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
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Therein lays the problem. I don't think any one will tell you this would be a pleasant task the only thing I can think of is a big concave dump site and hope for the best broom stick might be in order. If this is a new to you camper you have no ideal of what went in the toilet a disposable diaper comes to mind or even a plastic bag.
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07-10-2017, 03:52 PM
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#8
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Moderator
Join Date: Dec 2006
Location: Michigan
Posts: 6,155
SUN #123
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I would try Johnny's suggestion first. If that doesn't work, is the trailer set up on a seasonal site or no? I'd tow it around the block and see if a little bouncing will help dislodge things. Valve closed of course.
If the rod is coming all the way out on the valve, it should be opening all the way. It doesn't feel like different pressure at various points as you pull the valve open, does it? Such as hard at first then easy?
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2007 T-286SR Cherry/Granola, #6236, original owner, current mileage: 9473.8 (as of 6/18/21)
1997 T-2653 Blue Denim, #5471
1979 12 1/2' MC, Beige & Avocado, #4639
Past Sunlines: '97 T-2653 #5089, '94 T-2251, '86 T-1550, '94 T-2363, '98 T-270SR
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07-12-2017, 08:40 PM
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#9
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Moderator
Join Date: Nov 2006
Location: Ohio
Posts: 12,657
SUN #89
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If you crawl under and look at the valve stem on the end of the black tank dump valve, and that valve stem moves 2" to 3" or some part of that, then the slider valve should have opened.
If that is the case and no water is coming out, this sounds like a clogged tank discharge port.
Is your dump valve straight up from the end of the 3" dump connection or is there a 90 degree elbow there? Straight up makes this easier to unclog.
See this post it may help http://www.sunlineclub.com/forums/f7...tml#post135863
They show how to make a blaster tube you go in with to break up the clog. You may need to go up the dump pipe with the blaster tube. Since the tube is like 1/2" OD or so, hopefully it will not all break loose at once to allow you to get out of the way when it does break loose.
Good luck and let us know how this goes.
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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07-13-2017, 08:18 AM
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#10
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Moderator
Join Date: Nov 2006
Location: Ohio
Posts: 12,657
SUN #89
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Also see this post from Trailblazer on unplugging a clogged tank from the dump pipe. They show how to not make such a mess.
http://www.sunlineclub.com/forums/f7...tml#post138205
Hope this helps
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
Google Custom Search For Sunline Owners Club
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