Sagging cold water cistern

[DeeGee]

Hi

My cold water cistern is sagging quite heavily on the side with the overflow outlet, and this has put pressure on the joint on this outlet causing it to start dripping. I m draining the ststem to release the pressure, but any idea on the best way to prevent it sagging again when I refill having tightened the joint?

Thanks

 

[Dan Robinson]

Buy a new tank and install it properly.

 

[DeeGee]

I have only just moved in, and will be getting a plumber in to re-do most of the plumbing as the previous owner was a bodge artist, but wanted to make sure that the problem doesn't re-occur before I get can a new tank installed.

Any other suggestions?

 

[doitall]

And get the plumber to check the immersion heater etc, because the tank will only sag if it is not installed properly or has been overheated with a fault

 

[plumbnuts]

The tank should be on a flat base such as 19mm ply wood and this should be a minimum of 100mm bigger than the tank all round. You could try placing the old tank on a new base but be prepared that it may split. Is the water warm in the tank? If so you need a plumber sooner rather than later.
Steve

 

[DeeGee]

The water is cold, but the tank is on a base smaller than the tank itself. Thanks