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Old 03-06-2013, 04:50 PM   #1
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Black water holding tank tip

A golden rule for RV holding tanks is to never dump the black water tank until it is at least two thirds full. You want the tank nearly full so the weight and the gravity will force the contents of the tank to drain properly. Another golden rule is to never leave the black tank valve open at the campground and expect the toilet to drain or flush like the toilet in your home. It wonít work. óMark Polk, RVeducation101.com
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Old 03-06-2013, 05:06 PM   #2
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Another tip that seems to work is to put Calgon in the black take before you fill it up. The Calgon seems to coat the tank and does not make things stick to it. Also, When breaking camp, put a bag of ice down the toilet to help mix things up on the way to the dump station. Seems to help for me.
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Old 03-06-2013, 05:25 PM   #3
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Ice trick is a great tip I recommend it also
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Old 03-06-2013, 05:37 PM   #4
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Also helps to pour a couple of buckets of hot water down while it's open.
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Old 03-06-2013, 06:44 PM   #5
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not sure about putting Calgon down there ??

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Originally Posted by crunchman12001 View Post
Another tip that seems to work is to put Calgon in the black take before you fill it up.

I had forgotten exactly what Calgon was
so I went to the old goggle
Mountainman



Calgon is a brand registered trademark of different corporations. The original product consisted of powdered sodium hexametaphosphate (amorphous sodium polyphospate), which in water would complex with ambient calcium ion and certain other cations, preventing formation of unwanted salts and interference by those cations with the actions of soap or other detergents. Its name was a portmanteau derived from the phrase "calcium gone".[1] Originally promoted for general use in bathing and cleaning, it gave rise to derivative products which have diverged from the original composition. Today, Calgon water softener contains the active ingredients zeolite and polycarboxylate, which are less problematic in wastewater treatment than phosphates.
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Old 03-06-2013, 06:56 PM   #6
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Quote:
Originally Posted by Mountainmanbob View Post
I had forgotten exactly what Calgon was

so I went to the old goggle
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Calgon is a brand registered trademark of different corporations. The original product consisted of powdered sodium hexametaphosphate (amorphous sodium polyphospate), which in water would complex with ambient calcium ion and certain other cations, preventing formation of unwanted salts and interference by those cations with the actions of soap or other detergents. Its name was a portmanteau derived from the phrase "calcium gone".[1] Originally promoted for general use in bathing and cleaning, it gave rise to derivative products which have diverged from the original composition. Today, Calgon water softener contains the active ingredients zeolite and polycarboxylate, which are less problematic in wastewater treatment than phosphates.
Hey, are you going for (Herks)job? Youroo!!
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Old 03-06-2013, 08:54 PM   #7
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I'veoften seen recommendations that the black water tank should be at least two thirds full when you dump to get better drainage.

So what happensto the black water tank contents with the black water pumps that discharge through a garden hose? They sure won't pump as fast as the tank drains through a dump hose. The pump can't suck the contents out - the liquid still has to drain by gravity from the corners of the tank to the pump suction.
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Old 03-06-2013, 09:08 PM   #8
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Dumping a cup or two of Super Clean in an empty tank works like a charm also. Could never get a clear water flush with the Calgon/soap/bleach mixture. When I use Super Clean, I get clear water after about 5 minutes of using the tank flusher. I also always start any travel with a clean tank and dump two stool fulls of water and a cup of SC in the tank. Upon arriving at a cg, I hook up the slinky and open the tank and get clear water with a very slight color. No odor. I am sold on Super Clean for keeping the tanks clean.
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Old 03-06-2013, 09:33 PM   #9
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a man has to know his limits

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Hey, are you going for (Herks)job? Youroo!!

no way
nobody could ever fill those shoes
a man has to know his limits
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Old 03-06-2013, 09:49 PM   #10
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Dumping a cup or two of Super Clean in an empty tank works like a charm also.
What is this "Super Clean product"? I am not familiar with this. Thanks for the info.
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Old 03-06-2013, 10:27 PM   #11
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Yes, there are several "Super Clean" products. Exactly which one do you use in your black holding tank?

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Old 03-06-2013, 10:28 PM   #12
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Looks like you can get Super Clean at Menards and NAPA stores and hardware stores. Their website allows you to put in your zip code to find a store near you. The web has all the answers.
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Old 03-06-2013, 10:36 PM   #13
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Coconut Oil before use, and simple green concentrate overnight before dumping has always worked for me. The coconut oil keeps the tank level sending units and valves lubricated as well. The folks that we bought our first camper from told us about these tricks, and the tanks never smelled or clogged up in 18 years.

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Old 03-07-2013, 04:16 PM   #14
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Calgon that is used in RV black water tanks is water softner. I would not think of not using it in my black and gray tanks, it is known as the GEO methoid and it is very well known. It helps to keep things, AH paper, from sticking to the tank walls
and IMHO it is much better then using chemicals of any type in the tanks. Iy has worked well for me.
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