External Expansion Vessel - how to fit

[bluefudge11]

Hi all, this is my 1st post so hopefully i have not messed up:)

my combi boiler expansion vessel is shot so i want to fit an external one .
The boiler has Pressure Relief Valve, filling loop and gauge so i'm assuming i can just plumb a new vessel in to the CH return without having to use another PRV, gauge and filling loop?

It will be fitted close to the boiler

It is a sealed system - using Baxi 105e combi

Help and advice greatly appreciated
Thanks
BF