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Old 04-15-2019, 09:42 AM   #1
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Out Side Kitchen Sink To Black Tank

howdy

While getting trailer ready for the season I started cleaning/flushing out my gray, waste, fresh water tanks.

I ran the water in the outside kitchen, trying to fill up gray tank.
But no water ever registered on the water level gauge inside on panel.

However the black water tank went to 100 % , I had just filled, flushed and drained a little, I just thought I didn’t drain enough out so I drained down to 50%


Still running sink water I went to dump gray tank and nothing came out…….im confussed.

Again the black water tank went to 100%......ah hah light bulb goes off.




Outside sink Is running into black tank, I assumed it would go into gray.


Wonder if going into black tank was by design or someone goofed and connected to black by mistake.

Where does your outside sink water go ?


Side note the sink is plastic, never paid attention to it until i placed a hot tong on it, melted edge..



pete
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Old 04-15-2019, 10:16 AM   #2
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Right or wrong, they always seem to take it to the nearest tank. Looking at your floor plan, given that your kitchen sink and shower are forward of your toilet, I'd say your black tank is behind your grey tank, and your outside sink is slightly behind your toilet. So I'd say by design.

https://www.campersinn.com/product/n...24bs-660766-29
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Old 04-15-2019, 10:49 AM   #3
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Originally Posted by rockfordroo View Post
Right or wrong, they always seem to take it to the nearest tank. Looking at your floor plan, given that your kitchen sink and shower are forward of your toilet, I'd say your black tank is behind your grey tank, and your outside sink is slightly behind your toilet. So I'd say by design.

https://www.campersinn.com/product/n...24bs-660766-29



thanks for reply......makes sense in there twisted logic
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Old 04-15-2019, 11:02 AM   #4
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thanks for reply......makes sense in there twisted logic
How do you figure that is "twisted logic"?
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Old 04-15-2019, 12:40 PM   #5
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Agree, from a user perspective it is counter intuitive (Ie, sink drain is gray water...) however, from a build/layout perspective it is easiest to dump to the nearest tank.

My previous rig was like this (I found out the same way you did). The benefits I found are:
1)plumbing is localized to a central area. (Shorter pipe runs to winterize or keep warm while camping below freezing)

2) when connected to sewer I can drain the black tank then use the sink to fill and rinse with clean water to keep the sensors clean. While packing up, I fill/dump 3 times with water and my sensors would register empty. I did not have a black tank flush on that rig
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Old 04-15-2019, 02:19 PM   #6
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Originally Posted by pete00 View Post
howdy

While getting trailer ready for the season I started cleaning/flushing out my gray, waste, fresh water tanks.

I ran the water in the outside kitchen, trying to fill up gray tank.
But no water ever registered on the water level gauge inside on panel.

However the black water tank went to 100 % , I had just filled, flushed and drained a little, I just thought I didn’t drain enough out so I drained down to 50%


Still running sink water I went to dump gray tank and nothing came out…….im confussed.

Again the black water tank went to 100%......ah hah light bulb goes off.




Outside sink Is running into black tank, I assumed it would go into gray.


Wonder if going into black tank was by design or someone goofed and connected to black by mistake.

Where does your outside sink water go ?


Side note the sink is plastic, never paid attention to it until i placed a hot tong on it, melted edge..



pete
Pete, My outside sink is a plastic one also but it has no drain in it at all. Was you rig used and the previous owners added a drain. IM thinking about that myself for mine.
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Old 04-15-2019, 05:25 PM   #7
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I have a PUP.
Both inside and outside sinks go to the grey tank.
Draining a sink into the black tank is stupid...beyond stupid. Sink water will fill a black tank very quickly, and you have little recourse other than a dump station.

If you can reroute the drain plumbing from the outside sink to the grey tank, you'll be far better off, especially if you boondock. Without delving into the debate over grey water handling, if you are in the boonies, it's possible to dispose of grey water safely by watering trees. If you are in a more controlled camping area, you can easily tote grey water to a pit toilet or bathroom and flush it.

To make the job easier, you can make your joints with Fernco fittings.
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Old 04-15-2019, 05:34 PM   #8
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Originally Posted by jimmoore13 View Post
I have a PUP.
Both inside and outside sinks go to the grey tank.
Draining a sink into the black tank is stupid...beyond stupid. Sink water will fill a black tank very quickly, and you have little recourse other than a dump station.

If you can reroute the drain plumbing from the outside sink to the grey tank, you'll be far better off, especially if you boondock. Without delving into the debate over grey water handling, if you are in the boonies, it's possible to dispose of grey water safely by watering trees. If you are in a more controlled camping area, you can easily tote grey water to a pit toilet or bathroom and flush it.

To make the job easier, you can make your joints with Fernco fittings.
Explain that to FR. Many Motor Homes have hand sinks piped the Black water. Hand sink water is minimal and should not cause an issue.
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Old 04-15-2019, 06:45 PM   #9
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Originally Posted by chaps2018 View Post
Agree, from a user perspective it is counter intuitive (Ie, sink drain is gray water...) however, from a build/layout perspective it is easiest to dump to the nearest tank.

My previous rig was like this (I found out the same way you did). The benefits I found are:
1)plumbing is localized to a central area. (Shorter pipe runs to winterize or keep warm while camping below freezing)

2) when connected to sewer I can drain the black tank then use the sink to fill and rinse with clean water to keep the sensors clean. While packing up, I fill/dump 3 times with water and my sensors would register empty. I did not have a black tank flush on that rig

I may rinse out black tank as you suggested, even though I have black tank flush,. this way the boss wont yell at me for disconnecting water was while she's using it...
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Old 04-15-2019, 06:46 PM   #10
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Originally Posted by 56barelm View Post
Pete, My outside sink is a plastic one also but it has no drain in it at all. Was you rig used and the previous owners added a drain. IM thinking about that myself for mine.

new trailer came with sink
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