"Andy Hall" wrote in message
...

On a far simpler valve you have a
failure rate far higher than the more
troublesome mid-position 3 port valve.
Sounds like the system was faulty
somewhere.

There was nothing much else to it so
I can't see that that would
influence anything

Then you are just unlucky. Can someone be "that" unlucky using three
different makes of valves?

A two pump casting Grundfoss Tee setup
can be used instead of any 3-port valve,
mid-position or diverter.

Interesting idea and I believe not much different in cost to a
conventional set of pump and valve.



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