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Old 08-27-2018, 09:41 PM   #1
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My grey water to 3in sewer mod

Ok it’s not really a “mod” as much as it’s my solution to a problem that never should have been a problem. We full hookup camp about 90% of the time. Family with young kids it’s just the only way to go. So why would forestriver not connect the grey water tank to the black 3in dump like EVERY trailer on earth?!?!? I know people have replumbed the grey to the black. Maybe I will too until then here is my solution. I used a sewer clean out adapter (had to remove the one way rubber flap with pliers). I still have a ball valve to keep black water from going in to the grey water tank. Then I simply attached a short hose and done! I can take a shower and use the sink as much as I want. I only drain the black when it’s full. Cheap and easy solution.
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Old 08-27-2018, 09:54 PM   #2
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Is that a standard sewer connection on the gray tank dump?
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Old 08-27-2018, 10:27 PM   #3
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No. It’s a 1.5in grey water valve.
I suppose it’s a standard 1.5. But not a 3in.
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Old 08-28-2018, 08:06 AM   #4
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Nice way to git’er done!
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Old 08-28-2018, 08:19 AM   #5
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so, you have to have a 2nd 1.5" hose to deal with?
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Old 08-28-2018, 09:35 AM   #6
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so, you have to have a 2nd 1.5" hose to deal with?
Yeah. And they done make a 1.5 in hose that Iíve ever seen. They only make a screw on adapter to hook up a garden hose. Itís so dumb.
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Old 08-28-2018, 01:34 PM   #7
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No. Itís a 1.5in grey water valve.
I suppose itís a standard 1.5. But not a 3in.
But I can see what looks like a standard sewer hose connection in your photo of the grey dump valve. Is that the original valve gate?

Other than that I think you are right to be irritated.
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Old 08-28-2018, 02:53 PM   #8
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Genius!

I re plumbed mine with tees, black pipe and a 1 1/2 valve.

Your arrangement in the way to go.
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Old 08-28-2018, 05:19 PM   #9
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But I can see what looks like a standard sewer hose connection in your photo of the grey dump valve. Is that the original valve gate?

Other than that I think you are right to be irritated.
Itís a threaded inch and a half valve. I screw on a hose adapter like this.
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Old 08-28-2018, 09:26 PM   #10
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Itís a threaded inch and a half valve. I screw on a hose adapter like this.
Interesting, never saw that before.
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Old 08-28-2018, 11:06 PM   #11
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Interesting, never saw that before.
Me either. However I was looking at my parents toy hauler and the grey tank valve is a 1.5in to 3in. Apparently most grey water dumps are 1.5. But since it connects to a 3in common drain itís no big deal.
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Old 08-29-2018, 11:44 PM   #12
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Ok itís not really a ďmodĒ as much as itís my solution to a problem that never should have been a problem. We full hookup camp about 90% of the time. Family with young kids itís just the only way to go. So why would forestriver not connect the grey water tank to the black 3in dump like EVERY trailer on earth?!?!? I know people have replumbed the grey to the black. Maybe I will too until then here is my solution. I used a sewer clean out adapter (had to remove the one way rubber flap with pliers). I still have a ball valve to keep black water from going in to the grey water tank. Then I simply attached a short hoes and done! I can take a shower and use the sink as much as I want. I only drain the black when itís full. Cheap and easy solution.

Nice job! You obviously had vents for your shower and your sink. Otherwise you would get an air lock, not allowing you drain through your hoses.

On my previous 2007 Starcraft, I had a vent on the shower but didn't have a vent on my sink. So I had to make my own vent so that the water would flow through the hose to my blue tote.



The new 2019 2318G I'm looking at doesn't have a vent on either the shower drain or the sink drain. So I may make it easier on myself and put my blue tote directly under the shower drain and drop hose directly into blue tote, leaving blue tote vented. And for the sink drain, dropping a hose right to a bucket. I can either pour bucket into a toilet or into the blue tote. That way there less hose length and vent fittings to have to mess with.
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Old 08-30-2018, 09:55 AM   #13
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Nice job! You obviously had vents for your shower and your sink. Otherwise you would get an air lock, not allowing you drain through your hoses.

On my previous 2007 Starcraft, I had a vent on the shower but didn't have a vent on my sink. So I had to make my own vent so that the water would flow through the hose to my blue tote.



The new 2019 2318G I'm looking at doesn't have a vent on either the shower drain or the sink drain. So I may make it easier on myself and put my blue tote directly under the shower drain and drop hose directly into blue tote, leaving blue tote vented. And for the sink drain, dropping a hose right to a bucket. I can either pour bucket into a toilet or into the blue tote. That way there less hose length and vent fittings to have to mess with.

I didn’t see any additional vents on my sink or shower tank. I haven’t had any air lock issues. You shouldn’t have any air lock issues. The way I drain it to the 3in its the same as if you just hook up a hose to drain it to your blue tote. Just think of the 3in black as your blue tote. It’s definitely vented. You do have a vent. It’s the drain in your sink and shower worst case (if you have a shower). It’s definitely possible I’m missing something but, If it will drain in to a tote it will drain to a hose. It has to be vented or you wouldn’t be able to fill it. It would slowly fill with air burping back every time water replaced air.
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Old 08-30-2018, 10:36 AM   #14
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I guess I am confused as to what I am looking at as we have one dumping point for all three tanks.

But just a question could you use two "Rhino" hoses with a "Y" connector and have the same thing??


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Old 08-30-2018, 11:43 AM   #15
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My grey water to 3in sewer mod

That looks much easier than what I was usingClick image for larger version

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Old 08-30-2018, 09:34 PM   #16
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I guess I am confused as to what I am looking at as we have one dumping point for all three tanks.

But just a question could you use two "Rhino" hoses with a "Y" connector and have the same thing??


I suppose I could. I couldn’t find the correct adapter.
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Old 09-03-2018, 08:52 PM   #17
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Ok itís not really a ďmodĒ as much as itís my solution to a problem that never should have been a problem. We full hookup camp about 90% of the time. Family with young kids itís just the only way to go. So why would forestriver not connect the grey water tank to the black 3in dump like EVERY trailer on earth?!?!? I know people have replumbed the grey to the black. Maybe I will too until then here is my solution. I used a sewer clean out adapter (had to remove the one way rubber flap with pliers). I still have a ball valve to keep black water from going in to the grey water tank. Then I simply attached a short hoes and done! I can take a shower and use the sink as much as I want. I only drain the black when itís full. Cheap and easy solution.
Ya my problem exactly.
here is my setup.
My Mom had a Fleetwood Niagra Pup, which was done right with the Gray water draining into the black water with 2 shutoff's, so when u drain the black water u close the valve to the gray water or vise versa.
Ur right forest river needs to get it right. I was hoping when I traded in my 2010 296 with the same issue they fixed it in 2018.
Once my 5yr extended warranty runs out I'm gonna fix the problem and make it right.
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Old 09-04-2018, 07:27 PM   #18
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My former popup has Black Tank and 1-1/2 or 2" outlet T valve. I used a Y connection setup like you did, left a loop at the bottom to give a seal from gas coming back up. Left grey valve open.
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Old 09-04-2018, 07:28 PM   #19
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I also made up a short hose just for this hookup.
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