how much to fit a external pressure vessel?

[willy6215]

hello as the tile reads how much can i expect to pay.
i have a worcester 28sii combi boiler and the vessel is knackered.
its to much hassle to take the boiler off so i have been told i can have a external one fitted.
thanks

 

[dextrous]

look here

 

[willy6215]

just to add.
i have just had the internal vessel re-pressurised and its seems to be sticking at about nearly 3 bar, its not dropping suddenly when cold.
is this a sign that the vessel is broken?
i have experienced very high and low pressue which i have read are classic signs of it being broken.

 

[willy6215]

just to add.
i have just had the internal vessel re-pressurised and its seems to be sticking at about nearly 3 bar, its not dropping suddenly when cold.
is this a sign that the vessel is broken?
i have experienced very high and low pressue which i have read are classic signs of it being broken.