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Old 08-05-2014, 10:33   #1
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Water Tank Leak

I need advice please with a slow water tank leak.
I have a Hunter 41DS, with 2 white plastic factory installed water tanks.
One is leaking into the bilge slowly. The bilge pump goes on every hour or so for about 5-10 seconds.
It's tough to get to the tanks, but any advice?
Thanks
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Old 08-05-2014, 10:50   #2
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Re: Water Tank Leak

Noting whether or not it leaks when close to empty or not will give you some indication as to where the leak is. Obviously, if it's a problem with the vent or fill connection, it will only leak when full. If you can't visually tell if the out take connection is leaking, throw a towel under it to see if it's leaking.

Are you sure the leak is at the tank? Could also be at the pump, etc.

You might be able to repair a cracked tank in place, but likely it will need to be pulled out. I know some boats actually require one to cut the liner to get at the tank. I known some people have abandoned their original tank rather than cut up the liner.
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Old 15-05-2014, 02:40   #3
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Re: Water Tank Leak

It does sound like you have a small crack or seam leak, however do check the screw down lid too. In my case I found items stored under the water tank wet. Finally realised the lid was leaking. Filling at deck level produces a head in the hose once filled, so in my case all that water found its way below. Adding PTFE tape to the threads sealed the tank and stopped the leak!
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Old 15-05-2014, 10:33   #4
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Re: Water Tank Leak

I've just ordered an endoscopic camera on a 6ft. cable, so I can take a look behind the tank and hoses without taking the whole boat apart.

thank you both for all your help. I'll explore and hopefully fix this.

cheers!
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Old 15-05-2014, 19:37   #5
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Re: Water Tank Leak

Chances are it is a leaky tank fitting. I use Leak Lock.
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Old 27-09-2015, 13:27   #6
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Re: Water Tank Leak

Thank you for the suggestion.
I know I'm answering this very late, but now I will take a deeper look into the leak. Up till now I just have been adding more water, but now it's more frequent.
In going to remove the floorboards and sub floor panels and try to find it.
The tanks are not conveniently placed.

Thanks again
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Old 27-09-2015, 13:32   #7
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Re: Water Tank Leak

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