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Additional Water Tank?

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mattplowman View Drop Down
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Joined: 05 December 2017
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    Posted: 27 January 2024 at 18:47
Iím keen to add another 100l of freshwater tankage on our 355. Keen to see / hear any ideas or previous projects done. I like the look of the Plastimo flexible bladders but keen to see what else has been done by fellow owners.

Thanks
Matt 
H355 , #47
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sgrhma2 View Drop Down
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Joined: 20 November 2021
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sgrhma2 Quote  Post ReplyReply Direct Link To This Post Posted: 27 January 2024 at 19:31
In my 370, in addition to the standard water tank I added a 150L plastisol bag tank along side it. It filled and drained by a set of valves plumbed into the main tankís filler and outlet pipes. Iíve found it really useful on extended trips when cruising and also really useful by enabling showering onboard. My boat lives on a mooring and with the addition of a webasto water heater Iím able to go down to the boat hit the button for the water heater and I can then have a shower 20 minutes after arriving or I have hot water for the day without running the engine.
What I did find was that the bag tank needed sterilised a few times and rinsed before it lost its initial plastic taste. When both tanks are filled the boat is noticeably down a bit at bow, but surprisingly itís handling and performance is only marginal effected considering that thereís almost half a tonne of water sloshing about in the bow. 
To fit it I bonded wooden discs to the hull and tied the bagís attachment points to them. I also placed a piece of thick synthetic carpet under the tank to protect it from chafing. 
The tanks been in the boat for over ten years and Iíve found it really useful. I donít always fill it and depending how Iím using the boat Iíll use the main or bag tank to ensure the water is always turning over and never stored for too long or an extended trips both tanks.
For me itís been a really useful addition to the boat, uses existing fill and plumbing systems and a really light and reliable way to extend water range. I also have a water maker on the boat, but with the bag it hardly ever gets used now.

Hope this is useful 
Simon 
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Fendant View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fendant Quote  Post ReplyReply Direct Link To This Post Posted: 31 January 2024 at 07:48
I had a 100 l flexible tank on my previous Jeanneau Sunlight as the one and only main tank.
It worked well for about 15 years, I always filled with the water running until the bladder was full and water came out the filler cap fitting. One day the filling process took longer than normal which I attributed to a lower than normal flow. Wrong! My wife who was in the galley suddenly  got wet feet and I had to remove > 200 ltr from the flat bilges.
The tank burst open not at the seams but on the side.

I hope today's flexible PVC tanks have a netter quality.




Edited by Fendant - 31 January 2024 at 07:49
Frank
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Ratbasher View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ratbasher Quote  Post ReplyReply Direct Link To This Post Posted: 01 February 2024 at 17:08
My fourth attempt to get a message past the auto-censor:

Matt - I considered watermakers and extra tanks but for reasons of cost and complexity decided just to keep two 25ltr containers under mid-ships seats in the salon, simply taking them ashore for a refill whenever we anchor or moor.  That way the boat remains much better balanced as weight at the ends, particularly the bow, increases the chances of hobby-horsing in a seaway.  Whenever we're likely to need more capacity I keep another two containers in the lazarette and accept the compromise.  

Edited by Ratbasher - 01 February 2024 at 17:15
H400 (2008) 'Wight Leopard' now hibernating Gosport UK until April
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