holding tank monitor problem

[Stylin']

Just got back from a 500 mile trip and discovered that the monitor for the black tank reads 1/3 when empty. Drained the tank 3 times, and it read 1/3 all 3 times. Anybody have any suggestions? Dropping the tank is probably not going to be an option at this time. Thanks

[Stylin']

Just got back from a 500 mile trip and discovered that the monitor for the black tank reads 1/3 when empty. Drained the tank 3 times, and it read 1/3 all 3 times. Anybody have any suggestions? Dropping the tank is probably not going to be an option at this time. Thanks

[JRMora]

This happens a lot with many Black tanks (including mine). It's usually caused by a buildup of "stuff" ( ) on the walls of the tank. Mine will sometimes read full when in fact it's empty.

When I am on the road, I don't usually flush the tank, but before I put it away (we have to store off-site), I drop in five pounds or so of ice in teh tank, drive the 5 miles or so to the storage lot, then dump. I follow that with a good flushing of the tank (we have a flush nozzle in our tank), and voila!, everything is back to normal.

The ice really does help, just be sure to drive around with it a little to get the crud broken up.

Juan

[Sundevil]

The tank sensors are notoriously inaccurate. The best advice is to get some type of tank flushing system. I installed the Tornado and have had no issues since. This is my second RV with a tank flusher and I consider it a must have. I bought mine from camping world and installed it myself. The toughest part was removing the panels on the bottom of the fiver to get access to the tanks. Here is the link:
http://www.campingworld.com/browse/products/index.cfm/M...k-Rinser/prodID=4969

[Stylin']

Thanks for the replies. I'm reluctant to drill a hole in a perfectly good tank, so will try the remedies suggested. Another suggestion was probe cleaner; anyone try this? What's in it? Thanks

[kerfcutter]

How much water do you put in the tank along with the ice? Fill it iup or 1/2 full?

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by JRMora:
This happens a lot with many Black tanks (including mine). It's usually caused by a buildup of "stuff" ( ) on the walls of the tank. Mine will sometimes read full when in fact it's empty.

When I am on the road, I don't usually flush the tank, but before I put it away (we have to store off-site), I drop in five pounds or so of ice in teh tank, drive the 5 miles or so to the storage lot, then dump. I follow that with a good flushing of the tank (we have a flush nozzle in our tank), and voila!, everything is back to normal.

The ice really does help, just be sure to drive around with it a little to get the crud broken up.

Juan </div></BLOCKQUOTE>

[JRMora]

Usually a 1/4 to half full and it's usually the remains of an 8 or 10 pund bag of ice straight down the toilet. The drive to the storage lot is about 5 miles of stop and go traffic, and that seems to do the trick for me. I dump when I get there. Having it less than full allows the water to slosh more.

Juan

[Stylin']

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by JRMora:
This happens a lot with many Black tanks (including mine). It's usually caused by a buildup of "stuff" ( ) on the walls of the tank. Mine will sometimes read full when in fact it's empty.

When I am on the road, I don't usually flush the tank, but before I put it away (we have to store off-site), I drop in five pounds or so of ice in teh tank, drive the 5 miles or so to the storage lot, then dump. I follow that with a good flushing of the tank (we have a flush nozzle in our tank), and voila!, everything is back to normal.

The ice really does help, just be sure to drive around with it a little to get the crud broken up.

Juan </div></BLOCKQUOTE>

Many thanks for this reply; got a chance to try it this weekend, and it did the trick.