RE: Slightly OT: Joining cables to be used under water....

["Paul Gale" <groups2@xxxxxxxxxxxxxxxx>]

Or use one of the crimp type connectors that has a sealing compound
around the plastic sheath. I've had some in the past that are heat shrink
type that exude a glue when heated - fully seal the joint. Possibly a
little cheaper than the cold pour kit - although that's an excellent
solution too.

Paul.



> -----Original Message-----
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf
> Of Vargster
> Sent: 12 February 2008 21:49
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] Slightly OT: Joining cables to be used under
> water....
>
> I've got to join two cables to make a watertight seal... how?
>
> To explain, I've installed a 1500 litre tank in the garden to collect
> rainwater to be used to flush the toilets in the house.
> There is a small pump in the bottom of this tank, to pump the water up
> to a
> new header tank in the loft, before it comes down again to the
toilets.
>
> The problem is that the pump comes with a 1 metre lead power. It's a
> lightweight flexible mains cable, but it only carries 12V, I've got to
> extend this to get power to the pump outside the tank.
> The real problem is that the tank is 1.8 metres deep, meaning that a
> lot of
> the time the joint will be under water...
>
> I've tried soldering the cables together, then giving it a couple of
> thick
> coats of silicone sealant, which seems to work, but on further
> inspection
> the sealant does bond too well to the cables outer sheath. Sanding the
> sheath to rough finish doesn't help either.
>
> Keeping the pump at the bottom of the tank seems the best plan as it
> will
> generally be away from any ice that may form in the tank, though to be
> fair
> I haven't seen any ice in there, even on days when my "control
bucket"
> of
> rainwater has 1/2" of ice on it.
>
> I've thought about floating the pump on a styrofoam pontoon on the
> surface
> of the water in the tank, but the pump is the size of a coke can, and
> weighs
> nothing, which causes a problem of what to do with the 15mm+ of fairly
> rigid
> hose that takes the water out the pump and out of the tank...
>
> Any ideas, solutions, thoughts, etc gratefully accepted...
> Lee
>
> PS. Bringing it right back on topic, of course it's going to be
> controlled
> by the HA server...
>
>
> [Non-text portions of this message have been removed]
>
>
>
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