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Rain water infiltration
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Davide View Drop Down
Sub Lieutenant
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Joined: 28 October 2018
Location: Italy
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Points: 16 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Davide Quote  Post ReplyReply Direct Link To This Post Topic: Rain water infiltration
    Posted: 05 October 2025 at 10:32
Good morning to everyone!
I find water (rain water) under the floor of rear cabins, mainly the left one, it accumulates in a sort of tank dug in the mold. the water comes from a free space between the floor and the wall of the cabin (then that separates the cabin from the bathroom). Anyone else had the same issue and resolved? As soon as I can I put some photos to explain better
Thank

Hanse 375 - 2009


Edited by Davide - 05 October 2025 at 10:33
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Yoda View Drop Down
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Joined: 23 September 2022
Location: Devon, UK
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Points: 88 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Yoda Quote  Post ReplyReply Direct Link To This Post Posted: 05 October 2025 at 23:21
I used to get water there and eventually traced it to a leaking skin fitting under the sink. Is it defiantly rain and not water from the tank?
I fitted an inspection port under the toilet to access the space, dry it out and seal up the route taken by the water. 
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H8jer View Drop Down
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Points: 1503 		Post Options Post Options   Thanks (0) Thanks(0)   Quote H8jer Quote  Post ReplyReply Direct Link To This Post Posted: 06 October 2025 at 18:28
Agree.

Leaks there were in my case the fresh water hoses that had a leak.
Now I have the bad habit to look there for leaks, if the pump runs without anyone using water.
Hanse 370#487 30HP 3-cabin
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Jef-370 View Drop Down
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Points: 28 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jef-370 Quote  Post ReplyReply Direct Link To This Post Posted: 24 February 2026 at 13:54

Hello,

In our case (2007 Hanse 370e), the water that was accumulating under the floor of the port aft cabin was indeed coming from the bathroom.

It took me months to locate the leak: it was at the base of the shower pipe, inside the counter mould. This leak only occurred when the shower was in use (rarely, or to clean the toilet).

Good luck.

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Ratbasher View Drop Down
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Points: 818 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ratbasher Quote  Post ReplyReply Direct Link To This Post Posted: 24 February 2026 at 15:10
On mine it was the join from the hose to the fresh water pump outlet.
H400 (2008) 'Wight Leopard' Gosport, UK
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