Glenn thanks,
Can't remember but think we use solenoid upstream of AKVA.
We seem to be belts & braces as one call on some things would pay for belts & braces mentality.
Interestingly we can only buy EVRAT in Australia, initially to reduce warehouse double up stock, so not sure if you can even get a EVRA now or spare parts.
Believe you can still get TEAT, but have to buy in individual parts & put it together yourself.