"Toby" wrote in message
...
See for a Myson diverter valve.
http://tinyurl.com/g5xz

Or the Drayton ZA5, includes a limit switch. At rest Common to port A,
energised Common to port B.

Is the Drayton available in dealers or on the web?

Not sure about web, get nearly all my plumbing over the counter.
An email/call to discountedheating would get you one if you wish.
I believe the part number would be 679H314-30L0 for the 3-wire, not sure
on
the 5-wire.

The valve is just their 2 port zone head bolted to a three port body.
ZA5 head Zone Actuator 5 wire SPST
679-3 Three port body

I guess the only advantage over wiring a standard mid-position valve is
the
independant switch contact if for some reason you didn't want '240v on the
orange wire'

Mid position valves are less reliable than a standard valve top and end
switch.


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