"Andy Hall" wrote in message
...
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.

Water companies are now fitting them as standard, or a charge as a retrofit.
The quality has to be good, hence the stainless valves.

http://www.mkw-plumbing.co.uk/levervalve.htm