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08-26-2013, 07:07 AM
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#1
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Member
Join Date: Jun 2013
Posts: 42
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Holding tank trouble
Have a fifth wheel that is stationary and never had trouble with the black water draing with valve left open. Camping neighbor mentioned that was not a good idea because you need the added pressure of 2/3 tank to flush properly. Tried that method and now, of course have no drain. Any ideas on a chemical that works and is safe for RV's? Or other method. Stuck at 2/3 full. RFS
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08-26-2013, 07:22 AM
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#2
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Senior Member
Join Date: Mar 2008
Location: Front Royal, Va.
Posts: 391
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You probably have a pile of dried solid waste that moved over to block the exit when you emptied. The liquid in the tank will help to dissolve it. There are wands which attach to a garden hose which allow high pressure water to be injected into the tank. This may help. There is also a clear plastic device which connects to the discharge pipe and has a garden hose fitting on it. This will allow you to back flush the tank, possibly moving the clog. The fewer turns between the tank and the discharge, the better.
Sorry, but it is a crappy job.
__________________
Shawn M.
2011 Fleetwood Expedition
2014 Chevy Traverse
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08-26-2013, 07:38 AM
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#3
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Senior Member
Vintage RV Owners Club Holiday Rambler Owners Club
Join Date: Sep 2012
Posts: 605
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The subject has been discussed at great length here. Bottom line is, keep valve closed until ready to dump. Use lots of water. Rinse after dumping. Put a few gallons in tank after dumping.
Here is one thread on it.
As Shawn mentioned, I would try back-flushing it with something like this:
You can find it here at Camping World. It is a handy item to have on hand, especially if you don't have a flushing system built in. It can break up the clog in your tank.
Does your rig have a flushing system? It would be helpful if you let us know what year and model rig you have .
Good luck.
__________________
Steve, Mary & Buddy our 2-year-old Chihuahua mix
1995 36' HR Endeavor, 460 w/Banks, 2005 PT Cruiser
Fulltimers originally from Michigan, hanging out in Oregon for a spell.
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08-27-2013, 07:49 AM
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#4
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Member
Join Date: Jun 2013
Posts: 42
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black tank flush
Ok so seems that back flushing would be the most practical. I do have a sani flush fitting on the rig. wonder if that would also work ? Unless because black tank being blocked could cause further trouble when you apply added pressure to tank????
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08-27-2013, 07:51 AM
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#5
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Registered User
Join Date: Oct 2010
Location: Central Florida
Posts: 525
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You can also try a product from here: Happy Camper - Odorless Holding Tank Treatment Black and Grey Water
I've used their products for years and never had any problem what so ever. They do have a product for your situation.
__________________
R & E
No RV at the moment
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08-27-2013, 03:59 PM
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#6
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Senior Member
Join Date: Mar 2008
Location: Front Royal, Va.
Posts: 391
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Do not use the sani flush until you get the blockage cleared. It will quickly overfill and you will have poo coming out the vent on the roof. Not any way to make your neighbors happy.
__________________
Shawn M.
2011 Fleetwood Expedition
2014 Chevy Traverse
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08-28-2013, 08:28 AM
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#7
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Senior Member
Join Date: Jan 2013
Location: Rural Independence, OR
Posts: 951
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Quote:
Originally Posted by OSP1268
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Use the Happy Camper Extreme Cleaner as prescribed and your tank will be back to normal. Then use regular Happy Camper to keep it that way.
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08-28-2013, 08:32 AM
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#8
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,622
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Quote:
Originally Posted by OSP1268
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I agree with Roger! They have a product called "Extreme" that you need to use to clear the clogs, then use the regular product and you won't have any more trouble!
NEVER EVER leave the black tank dump valve open during use! That's just asking for the problem you are now having! Always keep a few gallons of water in it with the treatment above.
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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08-29-2013, 05:52 PM
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#9
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,652
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Quote:
Originally Posted by R F S
Have a fifth wheel that is stationary and never had trouble with the black water draing with valve left open. Camping neighbor mentioned that was not a good idea because you need the added pressure of 2/3 tank to flush properly. Tried that method and now, of course have no drain. Any ideas on a chemical that works and is safe for RV's? Or other method. Stuck at 2/3 full. RFS
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What you are experiencing is the result of leaving the black tank valve open all the time. That pyramid of crap moved to the drain and blocked it, a back flush, as recommended, might move it away from the drain opening and loosen the pyramid enough for at least some to be washed out by the 2/3 tank of liquid.
I have read of a few folks who had to replace the tank because they left the valve open all the time.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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08-29-2013, 06:11 PM
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#10
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Member
Join Date: Jun 2007
Posts: 72
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Get a product called Ridex available at Wallmart.
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