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Old 04-09-2015, 06:30 PM   #11
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I just throw in a cup of wash detergent and 6 gallons of water just before a short move and then let it swish around on the move. It seems to do the trick. All of the other suggestions are good.
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Old 04-09-2015, 09:31 PM   #12
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There are some things I don't need to record!!!




Sorry - I couldn't resist.

Add up all the notes and you will have one crappy story....lol

Lame but could not resist
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Old 04-10-2015, 03:06 PM   #13
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I camp without hookups and since my fresh water tank is 30 gal. and the black and gray are 30 gal. so without adding water I don't have enough water to fill up one of the tanks!
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Old 04-10-2015, 03:35 PM   #14
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I camp without hookups and since my fresh water tank is 30 gal. and the black and gray are 30 gal. so without adding water I don't have enough water to fill up one of the tanks!
True, but if you were to somehow measure what you finally dump; it will well exceed 30 gallons. Solids and bottled water/soda/beer/wine also adds to black and gray tank waste.
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Old 04-10-2015, 03:59 PM   #15
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True, but if you were to somehow measure what you finally dump; it will well exceed 30 gallons. Solids and bottled water/soda/beer/wine also adds to black and gray tank waste.
Very true! I drink the water from the tank but I sure accounting for all the beer would definitely make a difference!
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Old 04-10-2015, 08:42 PM   #16
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These work great

Horst Mircacle Probes - Get accurate reading on your RV's holding tanks
not sure how to paste a link but copy and paste the above and see what you think. only 5 trips with them so far but seem to work well. also had a 2/3 light on a lot not anymore
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Old 04-10-2015, 08:49 PM   #17
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Horst Mircacle Probes - Get accurate reading on your RV's holding tanks
not sure how to paste a link but copy and paste the above and see what you think. only 5 trips with them so far but seem to work well. also had a 2/3 light on a lot not anymore
LOVE mine. However when our long haired DD spent a few weeks camping with us I had to replace the gray tank spiral probes with black tank probes due to "hair".

The bottom ones are the OEM probes.
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Old 04-10-2015, 11:55 PM   #18
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You may just have a tower of doom blocking the drain. I have a forty five degree elbow with a hose hook up to shoot a jet of water back into the tank. Backfilling the tank may break up the blockage and allow everything to drain out.

Sorry if that is a little to graphic.
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Old 04-11-2015, 08:51 AM   #19
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You may just have a tower of doom blocking the drain. I have a forty five degree elbow with a hose hook up to shoot a jet of water back into the tank. Backfilling the tank may break up the blockage and allow everything to drain out.

Sorry if that is a little to graphic.
The trouble with the "back flush" method is that once the drain valve is partially blocked, the incoming water from the hose pressure has no force. By the time it turns the corner at the valve and gets into the tank; it just can't break anything up.

It is more effective to use a turboflush or toilet wand and work from the top.

The best way is to use bacteria and enzymes over time to eat away at that mess; then turboflush or wand the tank.

Always use a clear elbow in order to look for clear running water when turboflushing and don't worry if it suddenly stops. Keep flushing because when a clump hits the valve body water needs to build up a back pressure to push out the TP/solid that has been knocked loose.

Professionals will use a special wand on a pressure washer to get in there and blast stuff loose. If that does not work, tank replacement is the last resort.
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Old 04-13-2015, 06:11 PM   #20
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Horst Mircacle Probes - Get accurate reading on your RV's holding tanks
not sure how to paste a link but copy and paste the above and see what you think. only 5 trips with them so far but seem to work well. also had a 2/3 light on a lot not anymore
I think this company has sold out to Valterra and it does not appear that they are currently available except for a few high priced ones on Amazon.
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