"IMM" wrote in message
...

With 3 pumps you can match each pump to the requirements of a single
circuit - but the control logic is a lot more complicated,

It is simple. use a relay for each pump. Maplins sell a 5A 240v DPDT
miniature relay for 32.99 and 31.50 for the base. It is easy to arrange
DHW
priority .

Should be:
It is simple. use a relay for each pump. Maplins sell a 5A 240v DPDT
miniature relay for £2.99 and £1.50 for the base. It is easy to arrange DHW
priority .