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Old 02-03-2025, 06:30 PM   #1
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Sink drain leaking in underbelly

I recently purchased a 2015 Allegro RED 33AA. while doing my first water check i found a leak coming from the under belly. Tracked it down to the passenger side slide sink drain hose in the under belly is kinked when the slide is retracted and split. Now i need to replace it before my trip next week.

Question 1 what size hose is used for the drain line on the slide


Question 2 should I plan on replacing the entire hose



Question 3 will I have to remove the wet bay panel to access the end that attaches to the grey tank


Thank you in advance
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Old 02-04-2025, 12:43 AM   #2
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I can't address your particular coach, but the issue is common to many brands. The hose is almost always 1 1/2 pvc. How you repair depends on your setup. Often, the best solution is to replace the damaged section with a universal radiator hose or something similar. The best answer is whatever works for you.
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Old 02-04-2025, 03:35 AM   #3
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Same issue. Original drain hose too long so when slide came in, it kinked the hose which eventually caused it to crack and leak. Ernieh is correct on size. I just cut out the leaking section and replaced with new hose secured by a hose clamp on each end.
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Old 02-04-2025, 04:46 AM   #4
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It's a common problem w/the kitchen wall slide sinks. Pre-emptively replaced mine w/a 1 1/2" flexible PVC and carry a 30" spare. There may be a false panel under your sink held in place by 1-2 screws to access the hose. Very tight space to work in. Keep kids out while working as there may be some flowery language!

Many posts, same subject on this forum.

Good luck
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Old 02-04-2025, 05:00 AM   #5
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Originally Posted by Warhorse6 View Post
Same issue. Original drain hose too long so when slide came in, it kinked the hose which eventually caused it to crack and leak. Ernieh is correct on size. I just cut out the leaking section and replaced with new hose secured by a hose clamp on each end.

Thanks for the input, I can see the kink from the wet bay. unfortunately I'm unable to get to it from the pass thru compartment to cut it out and repair it in place. I'm coming to the conclusion that i will need to pull in a whole new hose
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Old 02-04-2025, 01:07 PM   #6
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Originally Posted by steveb05 View Post
Thanks for the input, I can see the kink from the wet bay. unfortunately I'm unable to get to it from the pass thru compartment to cut it out and repair it in place. I'm coming to the conclusion that i will need to pull in a whole new hose
Just be aware that the new hose will eventually have the same issue. I would suggest that you remove the old one and repair it with a more flexible option where it is broken.
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Old 02-07-2025, 06:15 AM   #7
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leak Repaired

I was able to pull in a new 1 1/4 spa Hose line in. it wasn't easy.

Took out the outside TV enclosure to get to the backside of the sink. Cut the hose 8 " from the original fittings cut the hose about 12" from the fittings on the grey tank. Attached the new 1 1/4" spa hose and with a friend,we were able to feed the hose in from the slide over to the grey tank. Reattached the hoses with 1 1/4" couplers and worm gear clamps. the hose now bends over the black water tank when the slide moves in and out


took about 6 hours to get it done.the most time was disassembling and reassembling the Wet bay and TV enclosure.



Thanks again for your responses.
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Old 02-07-2025, 09:48 AM   #8
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There is a you-tube channel (https://www.youtube.com/@todayissomeday) that had Red Bay do the repair on their Red33AA. There is a video on their channel. Required the removal of the furnace to repair/replace the drain hose. They used a plastic wash basin in the sink until the repair was complete.

There are several threads on doing this repair. One fella put a straight section of pipe that I think moved when the slide retracted. However, replacement of the hose with similar or better quality might be the best solution.

Good Luck with your resolution.
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Old 02-12-2025, 04:59 PM   #9
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On my 33aa there was a channel, about 12 inches wide, sheet metal and length of the kitchen slide depth in the kitchen slide that a few screws held on, that when removed exposed the 1 1/4 inch schedule 40 spa hose that moved with the slide, and exited to the gray tank behind the upper removable panel in the wet bay. I cut the existing hose in the bay and replaced with a like hose and made sure the coil in the new hose would move as the slide moved in and out. That fixed it. Hardest part was figuring out how to access, both ends. And the twist in the hose so it extended and retracted with the side.
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Old 02-12-2025, 05:25 PM   #10
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hose replacement

On my 33aa there was a channel, about 12 inches wide, sheet metal and length of the kitchen slide depth in the kitchen slide that a few screws held on, that when removed exposed the 1 1/4 inch schedule 40 spa hose that moved with the slide, and exited to the gray tank behind the upper removable panel in the wet bay. I cut the existing hose in the bay and replaced with a like hose and made sure the coil in the new hose would move as the slide moved in and out. That fixed it. Hardest part was figuring out how to access, both ends. And the twist in the hose so it extended and retracted with the side.
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