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Old 07-27-2025, 04:24 PM   #1
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Default 3300 mid ship bilge

Can anyone tell me where the mid ship bilge drains from? Mine has always been dry, but we have torrential rain and now I’m finding some water in there, not much, less than an inch after several days rain.

3300SCR
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Old 07-29-2025, 01:38 PM   #2
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Drains from? I'm not sure I understand your question. There should be a bilge pump in the mid-ship bilge. I would expect it to be installed on a platform and be incapable of dewatering the last few inches.

Get in there with a shop vac and remove the rest if need be.
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Old 07-29-2025, 02:37 PM   #3
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Drains from? I'm not sure I understand your question. There should be a bilge pump in the mid-ship bilge. I would expect it to be installed on a platform and be incapable of dewatering the last few inches.

Get in there with a shop vac and remove the rest if need be.
Sorry, I mean that I'm wondering where the water comes from. When I peer into the cavity, I can see a drain pipe that feeds into the cavity, so I was wondering where that comes from.

And yes, bilge pump is on a platform and the water isn't reaching it.
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Old 07-30-2025, 02:56 PM   #4
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The drain pipe is likely the hose from the condensation drip tray under the air conditioner. They make a device based on a venturi that you can route that hose to the raw water discharge of the same AC. Whenever it is running, it is drawing excess water from the drip try and dumping it overboard with the raw water.

My Maxum was built this way as is my Mainship.

Otherwise, the water might be coming from a slowly dripping pressure water connection, or from a leaking cleat, rail stanchion or rub rail when it rains.
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Old 02-18-2026, 09:54 PM   #5
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Default 3300 Mid ship bilge

Not sure if the OP has solved this yet but I have a 3300 with the same issue. I don't have AC so it wasn't from condensation. I found my fresh water tank had a couple of pin holes at the top corner seam. When I filled the water tank all the way to where water was coming out the overflow, small streams of water would spray out. When the level dropped below the pin holes it stopped so it took me a while to find. I used 3M 5200 to seal the pin holes and haven't had water in there since. 🤞
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