Black tank questions - Page 2

BillA · 09-21-2009, 01:11 PM

Mike,

On our trailer there is a warning near the black tank flush connection stating that the dump valve must be open when flushing the tank. I assume that is because of the possiblity of building up internal pressure as the tank is being filled through the flush line which could result in rupture of the tank or blowback through the commode during the next activation of the flush valve. Does yours have the same warning? If so I assume that it has not been an issue for you due to the small amount of water being added to the tank?

BillA · 09-21-2009, 01:18 PM

RodeWorthy, I agree with you that pulling the fuse appears to be the best method. I would guess that the manul flush method would require holding the rod down to maintain the flush valve in the open position.

Motor31 · 09-22-2009, 10:23 AM

Bill,

The tank has a vent that goes up to the roof. Unless the vent is totally clogged there is no pressure build up in the tank when the valve is closed and the flush hose on. The warning is to prevent you from forgetting to stop the flush hose and filling the tank up so it is full or over full the first time you use it.

BillA · 09-22-2009, 10:50 AM

Mike,

Thanks for the explanation. That makes sense and will use that procedure to flush the tank next time.

billr · 09-22-2009, 03:04 PM

Good story, not new but so true!

We were camped next to a Class A MH and my DW heard water rushing...I went to see and found water running off the roof near the front and also was coming out from under the entry door! No one home, but couple of dogs!

Went over and found two hoses hooked up and one was flowing. Shut off both and the water stopped soon after. I had a good idea what was up, but when the owner returned a few HRS later... I told him what IO found and he said "Man, did I leave the Black flush on AGAIN!!" :shock: :lol:

So if you do leave the black valve closed, and forget the black flush running, you too can have a nice fountain out the top of your Suite! And a bit of water from under the toilet seeming out from the pressure! :wink:

Bill

BillA · 09-22-2009, 04:49 PM

Story raises another question. I am carrying two water hoses, one for fresh water supply, one for flushing etc. Is that what most people do or am just being paranoid? I know there is a check valve in the flush line but not sure I want to trust it with my fresh water supply hose.

RonS · 09-22-2009, 05:28 PM

I use two hoses and keep them away from each other. When I use the flush system I stand by it, and close the tank valve to get plenty of water in at least half full then pull the valve handle. I do this several times untill I get clear water which I can see thru the clear adapter. I can get it to read empty, but I really dont trust the sensor's.

Huck · 09-23-2009, 07:24 AM

Quote:

I am carrying two water hoses, one for fresh water supply, one for flushing etc. Is that what most people do or am just being paranoid?

Personally, I use a separate hose for flushing.

I also carry a spray bottle with bleach in it.

When I stop at a campground I spray the fresh water faucet connection with the bleach to sanitize it. I have seen way too many people flush there sewer hose under the fresh water faucet when breaking camp :shock:
No one needs to get bacteria into there drinking water lines.

Some people are just brain dead..

Motor31 · 09-23-2009, 11:01 AM

I use 2 hoses as well. A standard green lawn hose for flushing and the white potable hose for supplying the trailer. I also back the green hose fitting off a bit so it's loose on the spigot or "Y" adapter so it will leak if the water is not totally shut off to the hose. That's my reminder that the flush water is all the way off when done flushing.