HELP! water quantity in an average 2 bedroom heating circuit

[sukhjeetgrewal]

hello guys,
I hope you guys might be able to help me here.
I want to size an expansion vessel for a HIU im designing. for that i have all the calculations but i have absolutely no idea that "how much water is there (approx.) in average 2 bed flats.
plumbers may know the answer to this question as they probably drain and fill these circuits most of time..

all i want is an approximation of water quantity stored in all pipes and radiators. please donot include the quantity of a boiler.

kind regards
Gary

 

[diamondgas]

No Idea, however the expansion vessels on boilers are usually around the 8/10ltr mark