On Wed, 5 May 2004 16:53:08 +0100, "Fash"
wrote:

One more question, do motorized valves produce a full shut off, such that if
I use a motorized zone valve on the flow and a ball valve on the return I
can isolate a section of the CH circuit?

Fash


They do a reasonably good shut off but not enough to act as an
isolation if you want to do plumbing work.



"Christian McArdle" wrote in message
.net...
Can they also be used as a mains stop cock?

Yes. Use 1/4 turn full bore lever valves for everything, except for
isolating low flow appliances such as washing machines and basin taps,
which
can use cheap reduced bore isolating valves.

Christian.




..andy

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