Hi,
Just got my 27 litre feed+expansion tank, which is long and slim to fit in the available space.
27 litres is on the small side of just about big enough - calculated expansion is about 10 litres (upto 80C working temp on 350 litre system) and might go as far as 15 litres if the system boiled (though at that point I care little if it starts going out the overflow).On my tank this equates to about 10cm height gain in the water level in the tank going from cold to hot. Nominal cold water level will be set at aroun
8-10cm giving a working height of about 18-20cm which seems about right for mounting the valve and overflow.So I don't want to use a normal arm ballcock - too much rotation stress as the ball will end up submerged at some point. I'm sure the tank will cope, but it seems bad to engineer excessive stresses in when it's avoidable.
So the obvious answer is a vertical float valve. But which one.
Choice seems to mostly be
Torbeck side inlet : part number 18198 on
Any pros or cons with either make?
Are there any other makes?
Cheers
Tim