Trouble reassembling water tank 'cap' - Adria Twin 2019

[ianto999]

Adria twin 2019.
Unscrewed the plastic part at top of fresh water tank (not the big blue bit) but the one where the pipes and 12v exit.
Nut underneath fell into tank but retrieved with magnet.
However, can’t work out how to screw it all back together, feels like there should be a plate or something to brace against, but can’t see anything else that has fallen into the tank. Did empty tank, but doubt anything big would have fallen out?

 

[Clivefog]

Can you undo the big blue bit and get access that way? Grand kids with skinny arms may be a help.

 

[ianto999]

Thanks - can take off big blue bit ok, it’s how I fished but out when I dropped in.
But even if I screw the nut on, it’s not holding onto anything.

 

[Clivefog]

What is that white plastic thing next to the pump?

 

[Kenp]

The bracket you need is shown in picture 2 bottom left, it is the shape of a squared off letter "C" or this shape. ]

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[ianto999]

Thanks - will dig out tomorrow when tank is empty.
How does it attach to the top of the tank?

The bracket you need is shown in picture 2 bottom left, it is the shape of a squared off letter "C" or this shape. ]

 

[ianto999]

I think it’s another lever for draining the tank, never worked out how to reach it.

What is that white plastic thing next to the pump?

 

[Kenp]

Thanks - will dig out tomorrow when tank is empty.
How does it attach to the top of the tank?

This sketch may help you.

 

[ianto999]

Many thanks - will rescue it when tank empty!
Really appreciate the sketch.

This sketch may help you.View attachment 868682

 

[Kenp]

I think it’s another lever for draining the tank, never worked out how to reach it.

I'm sure you are correct; it operates like a stopper for a wine bottle. Raise the "T" bar to the vertical, this allows the plug to shrink and be pulled out. Do the reverse when replacing it; moistening the rubber gasket will make it easier to replace.

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[Cush]

What is that white plastic thing next to the pump?

I think it’s a key that goes in the slot on top of a flush-fit screw cap to undo it. The kind we have them on boat decks so there is no trip hazard.