Composite valves unvented cylinder

[Matt0029]

Do most composite valves now for unvented cylinders have a tee on them For the expansion valve connection? The ones I used to fit just had the balanced cold connection coming of it. Them I tee'd off downstream of the composite valve for the expansion

 

[Scott_D]

All the ones I have fitted do.
most are caleffi valves

 

[Ben-gee]

I find you get fewer problems if the expansion vessel is teed off further away from the combination valve.