hi all,i am going to replace the expansion vessel on my worcester 24 cdi combi, as the old vessel diaphragm has split/perished. i am going to leave the existing vessel in position and fit the new vessel seperately in the airing cupboard where the boiler is located.the current vessel takes a feed from the side of the pump,but i am thinking of taking a feed to the new vessel from either the flow or return pipes that come below the boiler can i connect the vessel to either the flow or return pipes.the central heating is in a bungalow and feeds 9 rads. can i use a universal expansion vessel ie not worcester,and what size would i need,can anyone recommend a particular make cheaper than worcesters own.finally can expansion vessels be fitted anywhere on the heating system or do they have to be located within a certain distance from the boiler.thanks velo