Pressure vessel replacement worth uprating?

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8 Nov 2017
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Hi all
Strongly suspect my pressure vessel is fubar. It's a big house with 14+ rads. Is it worth uprating the 18L pressure vessel to 25L?

Cheers.
 
If they are all standard type radiators (not "school" or "hospital" cast iron types) almost certainly not necessary. Vessel needs to be able to hold 4% of system volume. Say 5% for luck, 18litres caters for (18 / .05) = 360 litres. That's a lot of radiators and pipe work.
 
They are standard. 4 storey house 14+ rads but I get your point thanks very much I'll get a 18L.
 

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