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Rain water infiltration

Printed From: myHanse.com
Category: Hints & Tips
Forum Name: 370 / 375
Forum Description: 370 / 375 Hints, Tips and News
URL: https://www.myhanse.com/forum_posts.asp?TID=15384
Printed Date: 27 March 2026 at 01:23
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Topic: Rain water infiltration

Posted By: Davide
Subject: Rain water infiltration
Date 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

Replies:

Posted By: Yoda
Date 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.

Posted By: H8jer
Date 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.

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Hanse 370#487 30HP 3-cabin

Posted By: Jef-370
Date 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.

Posted By: Ratbasher
Date Posted: 24 February 2026 at 15:10

On mine it was the join from the hose to the fresh water pump outlet.

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H400 (2008) 'Wight Leopard' Gosport, UK