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Old 09-12-2006, 10:36 AM   #15
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they render the most biodegradeable substance known to man non-biodegradeable, as well as anything else they come into contact with, such as other waste treatment systems (municipal sewer, or private septic).
Chuck, what you say makes sence considering that formadehyde is a preservative, i.e. a bacteriacide. But the thing I can't understand is why do so many septic chemical companies use it in RV black tank chemicals? I checked the chemicals we have been using and it claims to be formaldehyde free, but you'd think if that is something to boast about, the other chemical companies would omit it from their products.
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Old 09-12-2006, 10:46 AM   #16
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Originally Posted by Minnie's Mate
...But the thing I can't understand is why do so many septic chemical companies use it in RV black tank chemicals? ...
because they can. no law against it. and it works.
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Old 09-12-2006, 11:08 AM   #17
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I don't have a black tank flush system built in, so I purchased a Flush King that allows me to back flush either tank from the outside. It has a clear elbow, OK, not very appealing, but it does let you see when all is clean. I used to think I flushed my tank by refilling with several bowls of water and dumping again. I was amazed what gets left behind when dumping. It takes several iterations of back fushing to get all the solids out. I think this has made a tremendous difference in the general odor when flushing the toilet or inside a closed up unit.
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Old 09-12-2006, 11:55 AM   #18
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peegreen, I think your name is particularly apprapo to this thread.

I have the tank flush on my Safari and I have let it go at full flow for 10 minutes before and when I disconnected the sewer hose there was no noticeable smell. The owner's manual said let it run for 2 minutes so I did this last time and, well, 10 minutes is much better.

I had wondered about getting a clear connector so I could see when it was ready to discontiue the flushing, but I have only seen the clear ones with the Flush King units. Is there just a plain clear connector that isn't an elbow. I don't want to have to find a place to store it separate from everything else. I don't have a separate place from everything else. An elbow won't fit in the sewer hose tube.
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Old 09-12-2006, 12:46 PM   #19
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I tried this when i moved from La Grande, OR to Boise, ID. Seemse to help for a while.
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Old 09-12-2006, 12:59 PM   #20
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Clear connectors are THE way to go - not only can you tell what everyone has been eating , but you can tell when the tank is REALLY clean!
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Old 09-12-2006, 01:58 PM   #21
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Quote:
Originally Posted by chuck
because they can. no law against it. and it works.
And a long time ago these were the only products made....and they worked well. The early versions of the "enviromently friendly" products tended not to do as good a job in odor control.

I've stayed with the earth friendly products over the last 8 years or so. Some work better than others, a lot has to do with outside temperatures. In hot weather it's not unknown for us to dump a second treatment of stuff in the toilet. Especially since it may take us in excess of 5 days before we have to dump.

I also have the tank rinse valve on my Classic and we do use that on the day of our departure for home.

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Old 09-12-2006, 02:28 PM   #22
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When we have full connections, I dump my black tank every day. Is that too often? I had been holding both tanks and dumping them both every day but the last time we had full connections I left the grey valve open except when I dumped the black.

I was told that if you leave the grey tank open you get a grease build up on the bottom of the tank and it is a mess to clean to clean out. But it seems to me if you are going to get a grease build up (ring around the bottom of the tank) you would get that if you hold, just at a higher level instead of the entire interior surface of the tank and it would still be a mess to clean out. Anyone have any experience with this "ring around the bottom of the tank"?
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Old 09-12-2006, 04:52 PM   #23
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Quote:
Originally Posted by Minnie's Mate
When we have full connections, I dump my black tank every day. Is that too often? I had been holding both tanks and dumping them both every day but the last time we had full connections I left the grey valve open except when I dumped the black.
We don't dump our black that often and we don't have a grey tank. We only dump when "full" or especially odiferous. The reason is we want enough "liquid" in there to move the "solids" so they don't build-up. I guess if you use a bunch of water to fill your black tank before dumping it wouldn't be a problem...I guess we are just used to conserving water from boondocking with our small tanks (10 gal black/30 gal fresh). I would think if you use enough water & dump everyday you wouldn't need to use chemicals.

Our grey water bypasses the black altogether, unless up use a term cap and back it up into the black tank...yuck! So our grey is always running freely into the sewer connection or our blue belly. We've not had a problem with stinky pipes, but then I'm real careful about what I put down the drain and rinse the blue belly very well when emptying.

Shari
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Old 09-12-2006, 09:36 PM   #24
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Sewer Solution & the Girl's Toolkit

I'd never dump the black tank daily - unless I had six to eight people in the trailer. You'll empty the liquid, and start building the "black mountain" - which as it ages gets nastier and nastier. If you leave your black tank unemptied for 2-5 days, any solids in the tank would normally dissolve completely.

I use a Sewer Solution rather than the stinky slinky. www.sewersolution.com.

The hose is only one inch in diameter, and does allow you to put a backflow hose in the cap to move anything stubborn (usually toilet paper) that blocks the flow. Both the Drain cap and the hose are clear enough to see that everything has cleared.

My units also have built in tank flushers.

I notice that odors seem to be worse with the plastic toilet in my 06 25ft FB SE than they were with the porcelain throne in by 05 22ft CCD.... imagination? I don't know.

Anyway I've tried more than one brand of RV chemical, but have the best luck with the ordinary septic tank chemicals that are enzyme based. They will eat the grease in the gray tank too. Do check your vent pipe too. Insects LOVE to get in them and will block them up quickly.

NOW here's another "Girls Toolkit" (high heel shoe, kitchen knife) way to clear your roof vent without crawling up on the roof. Empty and rinse your black tank very thoroughly. Get your wet dry vacuum.. hook the hose on the blow side. Yep. Stick the hose up the drain and open the black gate... then run like hell when the hornets get blown out of the vent! I suppose a leaf blower might work too. (I considered vacuuming them into the tank, but then worried that they'd fly up the toilet when I flushed.)

Paula Ford
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Old 09-12-2006, 10:25 PM   #25
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no more oder

I bought a 360 from Camping World and NO more oders.

Not very expensive and it works.

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Old 09-13-2006, 08:34 AM   #26
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Quote:
Originally Posted by Minnie's Mate
When we have full connections, I dump my black tank every day. Is that too often? I was told that if you leave the grey tank open you get a grease build up on the bottom of the tank and it is a mess to clean to clean out. "?
I think Shari noted that you want to dump your black tank as full as possible. This gives you the rush of liquids that will carry the solids out of the tank. I know on short trips we will fill that tank with water if necessary prior to dumping the black tank.

I've heard some folks espousing the theory of holding the grey tank also until it's near full. One reason I heard was not because of the grease issue (I think you dump enough soapy liquids out to take care of that), but more towards keeping the flying critters out of your grey tank. I've heard stories regarding some folks claiming that some septic systems have been the source. The other was that by allowing it to fill, you will then have water to flush your drain hose when you dump the black water tank. Unfortunately, unless I'm dry camping, we probably would be dumping the grey tank every other day. I leave mine open with no negative consequences.

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Old 09-13-2006, 09:13 AM   #27
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Quote:
Originally Posted by Foiled Again
Get your wet dry vacuum.. hook the hose on the blow side. Yep. Stick the hose up the drain and open the black gate... then run like hell when the hornets get blown out of the vent! I suppose a leaf blower might work too. (I considered vacuuming them into the tank, but then worried that they'd fly up the toilet when I flushed.)

Paula Ford
yikes. have you got a shop vac hose and adapter that fits the Thedford fitting on the sewer drain?

You know, you could vacuum them into the vacuum. yeah, I know..."then what do you do with them??!!"
Seriously, there's a guy (maybe more than 1) that does this to collect the bees for medical purposes. He sucks them out of the hive w/ a shop vac, and has it rigged up where they are dumped into a container of dry ice, which quick freezes them. Then he sells them to medical labs, who extract the venom for research and for making medicines for people w/ sting allergies.

ANYhoo....
I'm glad I covered my vent pipes w/ screens. I did have to get up on a ladder to do that, but I think it was a worthwhile effort.

Jack: I think another reason for filling the grey between dumps is for the same reason as doing it w/ the black; the "big woosh" theory applies to both. Even though its on a much smaller scale, there'll always be "leftovers"...
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Old 09-13-2006, 09:19 AM   #28
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Jack: I think another reason for filling the grey between dumps is for the same reason as doing it w/ the black; the "big woosh" theory applies to both. Even though its on a much smaller scale, there'll always be "leftovers"...
Yep that would get food particles and any other goodies. I do a fill of the grey tank just before dumping the black. That way I can flush the nasties out of the drain hose. So my grey tank gets its flush on every outing.

I wouldn't subscribe to leaving the grey always open, unless you occasionally do a "big woosh" to that tank.

Jack
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