I have two black tanks as I have two bathrooms. I made a splinter so would not have to turn water off at source. Bad idea so I was flushing tanks and forgot to turn water off for the flushing. Next that happened my neighbor tells me I am leaking water in the front of my big horn 3875fb.it was not on for a long timethe water that overflowed did not smell like black water it was also clear. How did this water get out of the tank and was there any damage got rid of splinter but flushing does not appear to be very strong
Left flush water on with black tanks valves closed
- Thread starter mrrocko
- Start date
IronJ
Well-known member
Yeah...I did that before. ..cracked the black tank from hose pressure. .happened to many...
But it could have leaked at toilet too...
Basically it's gonna leak at toilet, blow out of toilet, blow out of sink attached to toilet/tank drain,blow out of roof vent, or "inflate" the tank and crack it......
I've seen every single one....unfortunantly my tank was one that cracked at seam...
Lesson (expensive) learned...
Lol
That was a first trailer mistake....I know better now...I think...
Sent from my SAMSUNG-SM-G925A using Tapatalk
But it could have leaked at toilet too...
Basically it's gonna leak at toilet, blow out of toilet, blow out of sink attached to toilet/tank drain,blow out of roof vent, or "inflate" the tank and crack it......
I've seen every single one....unfortunantly my tank was one that cracked at seam...
Lesson (expensive) learned...
Lol
That was a first trailer mistake....I know better now...I think...
Sent from my SAMSUNG-SM-G925A using Tapatalk
I got alot of water in front underbelly took it off and threw away the wet insulation, there was not alot of there,let it dry out and put it back together and still no leaks or sewer smell. No blowout around toilets no leaks that I can see. So how did the water leak out of the black tank? d does not seem like I busted the tank or plumbing as there are no leaks. Been watching it for two weeks
danemayer
Well-known member
My theory: as the tank becomes full, water will start rising up the vent pipe. It will also put upward pressure on the toilet sliding valve. Finally, the tank will change shape and may get distended enough that the water can come out of one of the entry points; either where the toilet pipe connects or where the vent pipe connects to the tank itself.
IronJ
Well-known member
And also the distended tank can break the usually poorly installed mounting straps and then fall out later....or distend enough till it rupturs a seam...the water WILL go somewhere if you fill the tank....
Path of least resistance and all that mumbo jumbo..haha
Sent from my SAMSUNG-SM-G925A using Tapatalk
Path of least resistance and all that mumbo jumbo..haha
Sent from my SAMSUNG-SM-G925A using Tapatalk
rxbristol
Well-known member
Personally, I don't think your black tank leaked it was the anti-siphon valve. Was this the first time you've flushed this? If so, the valve is either not connected, on backwards, or just leaking. If you've flushed before with no problems, it could still have leaked but the water stayed in the belly and you never noticed it. Find the valve and try flushing again and see if it's leaking (have someone watch the valve as you slowly turn on the water). I know from experience, I went to flush another 5th wheel and had fresh water going everywhere.
IronJ
Well-known member
Yes...great point....I totally forgot about the time I used a wash spigot and as soon as I flipped the water handle up bye bye anti siphon valve......
Just heard water coming from the belly....
And then finding the valve was a WHOLE diff story...
Sent from my SAMSUNG-SM-G925A using Tapatalk
Just heard water coming from the belly....
And then finding the valve was a WHOLE diff story...
Sent from my SAMSUNG-SM-G925A using Tapatalk
