Flushing out your sewage tank EZ WAY - Page 2 - Fiberglass RV


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Old 08-04-2014, 01:20 PM   #15
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Name: RogerDat
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To remove any stuck on solids from the tank one can throw part of a bag of ice down the toilet then put some water and normal chemicals in. First several miles of driving the ice will "scrub" the tank with sloshing around, then melt.

We would tend to do this at the end of the season. Dumping at a station close to home. Purpose was to leave the tank empty and clean for winter storage. Otherwise it we just finished dump by closing valve, pour a jug of water down the toilet, open valve and rinse stinky slinky as usual.

That is the nice part of the suggested mod. Or flushing from inside with hose or wand, or using the flush king. You are cleaning the stinky slinky on the trailer while still hooked up. As opposed to having to rinse the hose off the tank, splashing is not a good thing in that off the tank operation. I do NOT want to discuss how I know that.

If you have sensors cleaning serves a purpose. Keeping the sensors clean helps insure they are accurate.

Flush King has an included backflow preventer, at least according to their product description on camping world.
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Old 08-04-2014, 01:43 PM   #16
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FWIW: Almost no black tanks are "Sealed" The vent stack is always open and, under the right conditions it can be a source of unpleasant odors when parked or stored, hence the need to clean out the black tank.

I do as does Roger and use the "Bag-O-Ice" cleaning method 2-3 times a season. I even use that method in my Porta-Potties, usually on the trip home.

Unfortunately some users are to tired to dump the black tank before or on a drive home and leave it until the next trip when it is common to find hardened solids sticking here and there in the tank. Again, the ice trick usually knocks everything loose.
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Old 08-04-2014, 11:02 PM   #17
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quite true, Steve....

"Everybody has a different standard for cleanliness"

A ride on any subway at rush hour will drive that point home.....then there are people who won't shake hands with anybody for fear of catching their germs. Go figure...

I also know of people on septic systems who insist on having their septic tanks pumped out every single year...their money, who cares?

One's pursuit of cleanliness should not expose another person to the risk of illness. Agree? Where I live there are no "non potable flushing water sources"....and they sell Flushing Kings in local stores.

"Nobody is the sole judge for others"...Tell that one to smokers

I certainly wasn't trying to offend/blame/shame anybody....I was merely pointing out the risk and, IMO, the futility of a certain practice.....I get the impression that some put me in the same camp as the people who blame SUV drivers for global warming and want their behavior changed.....not the case here... I live sort of "out of the way" and what the general RV population does... I really don't give a hoot about really....

All hooked up and headed for Port McNeill in the am....there's a thing called "The Alice Lake Loop" up there and I'm going to give it a shot...........life is good
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Old 08-05-2014, 01:19 AM   #18
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Can't the ice freeze something and crack it in the valve area? We have used ice but then wondered about that.
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Old 08-05-2014, 02:06 AM   #19
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No, the ice will be melted in 30 minutes.
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Old 08-05-2014, 08:20 AM   #20
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Franswa,
That area map looks like a nice place to camp, I really enjoyed my brief visit to BC this summer at Osoyoos.
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Old 08-05-2014, 09:47 AM   #21
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"backflow preventer included".....

well FK fine print says backflow preventer included alright.....but where is it??? I don't see it in the many pictures provided....

that IS a garden hose fitting on the end of that hose....and that black thing looks like just a simple 1/4 turn in-line valve to me.....can't see that being it (not enough room)

could be wrong...happens lots....
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Old 08-05-2014, 10:30 AM   #22
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I think the gate below the garden hose fitting is the backflow preventer. According to the Flush King description, "Flush King rapidly refills the holding tank no matter what height of tank or angles in plumbing. Unique design eliminates messy wands and hoses inside the RV by allowing you to reverse flush your tanks from the outside. " The water is prevented from flowing down the sewer hose until after the tank has been re-filled. When the tank has been refilled, or rinsed, the gate can be opened and the tank flushed again. Appears the purpose is to avoid running back and forth to the inside to add water to the tank for a 2nd flush.
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Old 08-05-2014, 10:39 AM   #23
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To go back to the OP's picture and explanation. I'm not sure I completely understand your operation. Are you saying that after you've connected your sewer hose and dumped your black water tank, you then disconnect it and stick a garden hose up your vent pipe to flush the tank? Doesn't residual black water splash all over the dump station area? That wouldn't be very sanitary. Lot's of places wouldn't allow that practice. You must be connected directly from your black tank to the dump station's sewer opening via your big sewer hose. And how do you connect your garden hose? At most dump stations the hose for flushing your sewer hose does not have a garden hose type connection on the end of it. Usually there is no connection at all, just a piece of hose with a cut-off end. Or do you just stick the dump's hose up the vent? Either way I wouldn't recommend this type of procedure because of the chance of spraying black water all over the place. Of course, black water does get splashed around at dump stations but why risk adding to the problem and maybe getting it on yourself too?

I'm kinda in Franswa's camp on this. I've never quite understood the need to do all that flushing of black water tanks in the first place. Yes, if they're not maintained properly, "gunk" can build up in the tank, but treat 'em right and you won't have any problems. Dump your black water when it's at least half-full (fuller is better, run some water into your toilet if you need to). After you dump, run a little water into the toilet and add your preferred tank treatment and your good to go. The ice cube trick can work well too.

We also never drink from our fresh water tank. Mostly we don't like the off taste of the water from the tank. In some parts of the country, particularly in the SW, the water can be very alkaline and unpleasant to drink too. We rely on refillable jugs of water for drinking, filling them at campgrounds if we think the water is clean and good tasting, or at supermarkets where they have those filtered water machines. Some people use their own in-line filters, but that's just one more thing to deal with. We like to keep it simple.
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Old 08-05-2014, 10:43 AM   #24
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The anti-siphon, backflow preventer is installed on the fresh water supply to prevent sewer contamination going into the fresh water supply hose at least that is what I have always thought?? They are installed on supply lines to tank rinsers.
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Old 08-24-2014, 05:33 PM   #25
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Franswa:
I sent that photo to everyone I know!

Never saw it before! Thanks!
Sue
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Old 08-24-2014, 05:41 PM   #26
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I don't know. I love the plain, old Rhinoflex. My lines are separate, too. There's a $7 rinser I attach to the dump fresh water hose to rinse out the 3". No smell at all. The whole system, with the extra clear 90 degree clear elbow was $40. Those fancy gadgets are more than double that. And they're slow. Mine's so quick. I actually fill and empty 3 times and it's fast.

Don't see why I'd ever need anything else.
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Old 08-24-2014, 06:52 PM   #27
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Originally Posted by Evergreengirl View Post
We also never drink from our fresh water tank.
Off topic but "ditto". We have only been on week-long trips max so far but have no trouble keeping plenty of drinking & cooking water in milk jugs filled and brought from home.
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