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Old 02-29-2012, 07:34 PM
f6bits f6bits is offline
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Default How do you know when your tank is too full?

Iíve not found a description of this:
What happens when your grey or black tank is too full?

For the grey, does it just back up into the shower/tub basin? When my grey indicator is FULL, Iím not sure if itís accurate or not.

For the black, does it just fill up to the valve, and then some? Iíve experimented by by letting the toilet flush a constant flow of water while shining a flashlight down the opening, but stopped before it got too close to the top.

In either case, are the tanks sealed well enough that overflow wonít send waste water elsewhere?
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Old 02-29-2012, 08:08 PM
Festus2 Festus2 is online now
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If your tanks are full, any additional water/waste will be dispersed elsewhere in the system and that is usually back up through the pipes into your sink basin(s) or shower/tub, or the toilet. The fluids have to go somewhere - the tank and pipes can't expand to hold any additional volume.
The holding tanks should already be sealed properly so they won't allow any excess fluids to leak out where the PVC pipes join the tanks.
Holding tank read-out indicators are notorious for giving false readings - especially the black tank. If they aren't flushed out properly or the insides allowed to dry out, any solids or other crud may build up around the sensors and give false readings. That is why it is important to keep your tanks both clean and moist.
There are numerous posts already on the forum about holding tanks and what people do to clean them out, to keep them and the sensors clean. I would suggest doing a forum or Google search since this topic has already been discussed at great lengths earlier on the forum.
You probably shouldn't notice any false readings if you are experimenting with clean water. These readings may appear after you have used them for a period of time.
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Last edited by Festus2; 03-01-2012 at 07:17 AM.
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Old 02-29-2012, 08:33 PM
f6bits f6bits is offline
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That’s the info I was looking for. I’m a neat-freak, so my tanks are ridiculously flushed, cleaned, and treated. I’ve just noticed that when my FULL light turns on as expected, some more use hasn’t caused anything to overflow. It makes me think that “FULL” is more like 90+ percent of my 30 gallons.
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Old 03-01-2012, 04:50 AM
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Quote:
Originally Posted by sdayman View Post
It makes me think that ďFULLĒ is more like 90+ percent of my 30 gallons.



X 2 When mine reads full there is still a little room.
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Old 03-01-2012, 06:50 AM
allentx1 allentx1 is offline
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Just to add to what Festus said with a funny story... my in laws were using our 5th wheel and we got a call that the sink was backed up in the kitchen. I went over to assist and noticed a plunger outside the door. When I asked what that was for (my trailer, I want to know if something is broken) mom in law says we tried to plunge the sink... didn't work. I informed them that all the water they washed down the sink had to go somewhere and that somewhere was a small tank under neath. That has to be emptied periodically. Anyway, emptied and the water drained. I have also found that the toilets will fill into the pipe and really cause you not to want to use them...
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Old 03-01-2012, 04:58 PM
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mhs4771 mhs4771 is offline
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Ditto the Gray water backing up in the tub or kitchen sink. On ours we can continue using the toilet till it "Burps". A little hard to explain, but once it does it you'll know. Some times you can just tell by the different sound it will make as it's flushed.
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Old 03-01-2012, 05:12 PM
hankaye hankaye is offline
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Howdy All;

Forgive me please....

"How do you know when your tank is too full?"

You know when you hear a squishing sound when you walk around in the RV.

Hard to pass-up a good one-liner when someone lays out the streight line for ya... I'll behave now.

hankaye
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Old 03-01-2012, 08:41 PM
golfpro golfpro is offline
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I saw a video on this very question. the guy filled his black and his grey tank with a five gallon bucket, until the sensor light just came on, then he kept filling to see how many gallons he could put in before the water came up into the shower. then he knew for sure just how many gallons he could safely put into the tanks. to me it was a waste of water. I for one go until the lights come on then dump. As far as I'm concerned it is full and needs to be dumped ASAP
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Old 03-02-2012, 06:04 AM
outbackmac outbackmac is offline
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i agree with Golgpro when my sensor reads full i flush real soon after that, chemicals are cheaper than getting that lovely smell in the trailer,
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Old 03-02-2012, 07:47 AM
f6bits f6bits is offline
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If it’s 10 at night and I’m camped without a sewer hookup and the FULL light comes on, I’d like to know if I can make it until morning.
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