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Old 05-05-2013, 07:41 PM   #15
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It appears that you have a pretty 'crappy' situation to deal with now. Chances are that you have built up one heck of a dam at the drain opening that is preventing the tank from emptying.

There are professionals that have specialized equipment to clean out the clog and the tank. I would hire them to come to your RV and do the deed.

Then with what you have learned here, with the proper usage and water, etc. you should be able to keep your tank flowing the way it should.

It is always better to keep both tank valves closed unit the tank is full or 3/4 full. Then dump the black tank first and when that is empty leave the valve open and then pull the grey tank valve to empty that tank. Once both tanks are empty, close both valves for the next time.

Using a clear fitting at the valve before the hose is a great idea, it gives you a way to monitor the action going on.

Using Calgon water softener helps too along with using LOTS of water.

You may have to dump the tanks more frequently but water is your friend.

Dr4Film ----- Richard
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Old 05-05-2013, 08:32 PM   #16
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Quote:
Originally Posted by Dr4Film View Post
It appears that you have a pretty 'crappy' situation to deal with now. Chances are that you have built up one heck of a dam at the drain opening that is preventing the tank from emptying.

There are professionals that have specialized equipment to clean out the clog and the tank. I would hire them to come to your RV and do the deed.

Then with what you have learned here, with the proper usage and water, etc. you should be able to keep your tank flowing the way it should.

It is always better to keep both tank valves closed unit the tank is full or 3/4 full. Then dump the black tank first and when that is empty leave the valve open and then pull the grey tank valve to empty that tank. Once both tanks are empty, close both valves for the next time.

Using a clear fitting at the valve before the hose is a great idea, it gives you a way to monitor the action going on.

Using Calgon water softener helps too along with using LOTS of water.

You may have to dump the tanks more frequently but water is your friend.

Dr4Film ----- Richard
Thanks!
I have learned quite a bit here!!! Once this situation gets remedied, I will really be more aggressive in taking care of these tanks! Like I said before,
the camper sat for 4 years and God knows what we are dealing with......One of these days I won't feel like such a newbie!!!

Thanks again all for all your input, I really know where to head when I have a problem...
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Old 05-05-2013, 10:44 PM   #17
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Very similar problem on our new to us motorhome. I always carry a clear adapter with a garden hose attachment and an extra 3 inch valve that attached just after the clear adapter. Using this you can force water back into the tank to dislodge anything that is blocking the outlet.

Camping world sells the "Flush King" for this purpose.

Flush King - Valterra FK-01 - Sewer Flushing - Camping World

I ended up replacing the black dump valve because it was constantly leaking. Found the normally three inch opening had reduced to about an inch and a half due to solids turning to cement! I think the coach had sat on the dealer lot for an extended period of time and, due to the black tank valve leaking, there was an abundance of solids left in the tank. I was able to chip away at the tank outlet and remove the majority of the "cement" but continued to see chunks coming out of the tank when filling and dumping with fresh water. I then let it soak with dish washing soap (Dawn) for several days followed by an extra strong dose of TST treatment and it now looks like the majority of the "cement" is gone - I sure hope so!

Hope this helps!

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Old 05-05-2013, 10:57 PM   #18
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It might not be a block at the dump pipe or valve...it could be the dreaded - Pyramid Of Poo!!

Here's some info:
Avoid the Pyramid of Poop | RV Tip of the Day

and

HOW TO: Dump & Clean an RV Black Tank - YouTube

Best of luck
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Old 05-06-2013, 12:10 AM   #19
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It's normal on most MHs for the handle to turn, and should feel about the same as the grey valve when opening and closing it.
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