estimated the water volume

[TFGplumbing]

How can I estimated the water volume of underfloor heating? so as to size the correct expansion vessel?

I don't know the exact length of pipework that's been installed as i didnt install it

Thanks

 

[wetdrip]

How long is a piece of string?
But if you can guesstimate go here thereafter:
https://www.underfloorheatingsystems.co.uk/2011/08/underfloor-heating-guidelines/

 

[kris]

Depends on pipe centres , lengths etc ,,,, u can roughly say Water Volume @ 200mm centres = 0.85 litres per sm,, but your pipe centres may differ ,

 

[jonnyswamp]

Allow for 150mm centres and you should be OK
Better to be slightly over sized on the vessel than under

 

[TFGplumbing]

Thanks guys

 

[gassafe]

It's not a real science, I'd say go a little bigger if your concerned...