On 20 Aug 2006 16:09:36 -0700, wrote:

NikV wrote:
"Graham" wrote in message ...

What are the advantages and disadvantages of gate valves and full-bore
Ball valves for mains water, and isolating parts of a CH system.

gate valves 'let by' and sometimes drop their 'gate' from the thread -

given the list of cons mentioned, why r they used?

They're cheap :-)

--
Frank Erskine