Plastimo flexible tanks...which way up?

Iain C

Iain C

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Following my recent do I/don't I thread, I changed my fresh water tank for a triangular, flexible Plastimo job. So far, so good! It's much more secure, does not leak half of it's contents into the bilge giving me premature heart failure, and has almost tripled my capcity.

But a daft question...the inlet and outlet are both on the same side, so I've installed them on the bottom, so gravity can do it's thing. Obviously, the jubilee clips have been wrapped in miles of gaffa tape to avoid any chafe issues, but I do wonder if it could be installed the other way up, with the pipes at the top. Does a humble whale galley pump have enough "suck" to be able to draw the water out of the top, or am I going to always have about 30% of the water that cannot be used?

Thanks!
 
I have a Whale galley pump (hand operated). My deck filler is air tight and my pump will flatten my Vetus water tank completely as it extracts the water. If you have a slight air leak, your pump won't do this and water will remain in the part of your tank below your pipes.
 
Outlet definitly needs to be at the bottom so if inlet and outlet are both there that's the way it will need to go. I know it's flexible and should collapse as water is drawn out but you can't garantee that the outlet will always be in the water so you might be sucking air some of the time.
 
No they go on the top!

They go on the top
If they are on the bottom they will damage the tank and you wont get the air out of the tank

they go on the top
 
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Cheers guys.

So...from the website...

Ø 38 mm inlet valve is situated on upper side of tank ;
Ø 12 mm outlet valve is situated on underneath side of tank.
(except on triangular model : inlet and outlet are both on upper side of tank).
Height of tanks, when filled to capacity : 25 cm.
Outlet valve, situated on underneath side of tank

Right, so if I understand this, if I put a square tank in a square space, so when full the tank will be very much sitting on it, that's OK. But if I put the triangular tank in a triangular space (and by that, I mean that the V, or rise of floor of the hull when viewed from ahead) , which probably means that when the tank is full, there's actually a gap underneath it, that's not OK?

Seems a bit odd really...and a total PITA as I ned to swap it over now, and totally re-route my outlet.

Why oh why was this not mentioned on the box...and do I recall seeing that there was an option on the triangular tank where the outlets were on different sides?

Hmmm....
 
My triangular tank ( Made by Air Cushion Equipment) is in the bow,

It sits mostly on a flat base ( made of ply) although the tank is bigger than the base so the edges rest against the inside of the hull.

Inlet is on the top near the front end.
Outlet is also on the top near to the centre of the opposite side.

Must have had it for nearly 30 years now!
 
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