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Old 06-06-2020, 01:20 AM   #1
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Default Looking for donut for 2018 RoadTrek CS Adventurous

I haven't been able to find a sewer donut for our RT that accepts the ~1" diameter nozzle from the macerator and fits into the standard 4" sewer pipe. Can someone tell me where to buy one? Thanks!
-Mike Sollins
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Old 06-06-2020, 02:41 AM   #2
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Originally Posted by Mike Sollins View Post
I haven't been able to find a sewer donut for our RT that accepts the ~1" diameter nozzle from the macerator and fits into the standard 4" sewer pipe. Can someone tell me where to buy one? Thanks!
-Mike Sollins
Mike, my Airstream Avenue with macerator uses this at the end of the 1" hose. It has threads to screw into the dump opening and a cap on the end.

Very pricey for a hollow piece of plastic, but lightweight and works well enough.
https://www.amazon.com/Thetford-7040...1411122&sr=8-7
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Old 06-07-2020, 02:25 AM   #3
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Thanks. I might get it but it does seem like a lot of money! I wonder why no one sells a simple rubber donut...
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Old 06-15-2020, 01:44 PM   #4
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Default Donut

Is this what you need?
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Old 06-16-2020, 07:32 PM   #5
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Thanks, but I'm afraid not. The inner diameter at one side needs to be ~1 inch to for a snug fit for the narrow macerator hose nozzle. But, come to think of it now, maybe I can take a standard 4" screw-in plug and drill the needed size hole.
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