As noted, the fuel system was changed to delete the small header tank
early in the production cycle.
In addition, if the freeze does strike at your house and 'if there is a stopcock fitted on the system side of the header tank
, this should be turned off too.' The brochure is available on the ABI website: http://www.abi.org.uk or from the ABI, 51 Gresham Street, London EC2V 7HQ; 0207 600 3333.
This water flowed into three 500-L header tanks
, where the pH was controlled through the addition of gaseous C[O.sub.2].
The four sets of ingredients, these being liquid egg yolks, liquid premix spice/vinegar, oil and starch are delivered into header tanks
from which they are proportioned and pumped using a Bran + Luebbe multi-head H4 pump.
Rainwater collected from the roof of the visitor centre is stored in a 22,500-litre underground tank and then pumped into two linked header tanks
by a submersible pump, powered by wind and solar- generated electricity.