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Old 05-26-2018, 12:05 PM   #1
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fitting for outlet of grey water tank

I'm looking for a fitting to attach to the grey water tank outlet of my HW277. The outlet is threaded male and the outer diameter is 1-3/4 inches. The inner (smooth) diameter is 1-1/2 inches. Every connector I've been able to find (like this one https://www.etrailer.com/RV-Sewer/Va...01-0091VP.html), claims to be 1-1/2 female to 3/4 male. I don't care about the 3/4 end but 1-1/2 female end doesn't seem like it would work. Is the Forest River grey water outlet really non-standard?

Thanks,
Ken
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Old 05-27-2018, 06:35 AM   #2
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I have the same trailer I made a threaded adapter that upsizes to a standard sewer hose connector also your trailer should of come with a connector that you can attach a garden hose to
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Old 05-27-2018, 07:17 AM   #3
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Originally Posted by khackbarth View Post
I'm looking for a fitting to attach to the grey water tank outlet of my HW277. The outlet is threaded male and the outer diameter is 1-3/4 inches. The inner (smooth) diameter is 1-1/2 inches. Every connector I've been able to find (like this one https://www.etrailer.com/RV-Sewer/Va...01-0091VP.html), claims to be 1-1/2 female to 3/4 male. I don't care about the 3/4 end but 1-1/2 female end doesn't seem like it would work. Is the Forest River grey water outlet really non-standard?

Thanks,
Ken
What makes you think the 1 1/2 female end won't work? That is the ID of the fitting. The 3/4 end is the ID of a standard garden hose.

Just like pvc pipe fittings. Galv fittings, copper fittings.
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Old 05-27-2018, 01:32 PM   #4
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That's what makes me think it won't fit. The OD of the outlet from the grey water tank is 1-3/4. the ID of the tank side of the coupler is 1-1/2... I've ordered one from Valtera (via Amazon). If it doesn't fit, I'll design and 3D print an adapter.
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Old 05-27-2018, 01:34 PM   #5
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Darned if I can find it if they gave me one!
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Old 05-27-2018, 02:29 PM   #6
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Quote:
Originally Posted by khackbarth View Post
That's what makes me think it won't fit. The OD of the outlet from the grey water tank is 1-3/4. the ID of the tank side of the coupler is 1-1/2... I've ordered one from Valtera (via Amazon). If it doesn't fit, I'll design and 3D print an adapter.
yep the OD of the tank side is 1 3/4. The ID if the tank side is 1 1/2. The ID of the coupler is 1 1/2. No bumps no ridges. Smooth connection. It'll come to to ya.
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Old 05-28-2018, 06:12 AM   #7
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Its just a standard hose connection. I use a female PVC adapter, tee and 2 short pipes to dump into a bucket or white 5 gal water jug only used for Grey water
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Old 05-28-2018, 01:38 PM   #8
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Fitting

We have a T21QBHW and that is the exact fitting we use.
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Old 05-29-2018, 04:36 AM   #9
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When we had our HW27KS, I made a connection that allowed me to attach a regular sewage hose to the grey tank valve. Thereís a long thread somewhere on here about the parts and parts numbers. I donít have that info.

Sorry for the poor pic quality, but I think you get the idea. This allowed me to connect like you see in the other pic. Sometimes I would just connect one sewer hose and switch between valves as I needed to dump.



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Old 05-29-2018, 08:54 AM   #10
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works after all...

Well, I clearly don't know how to measure the OD and ID of threaded parts. The Valtera 1-1/2 inch coupler arrived yesterday and it fits the output pipe of my grey tank...

Thanks all!
Ken
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