there should be a drian off control valve at the bottom somewhere, connect a
hose to that (with the other end outside or in a toilet), Switch water
off, either by the tank or to the whole house, Switch boiler off and
open drain off valve.

If no drain off valve, then you can turn boiler off, turn water off and
open hot and cold taps and this will drain it all down. I would open all
taps just to make sure there is no water left in pipes.

If you have a drain off valve, this is the best option as it drains it all and prevents any risk of water coming out.

The development of knife gate valves and their related products is an
example of innovation and commitment to customer service on behalf of
their manufacturers. The designs of these valves and the materials used
in order to manufacture them, is keeping pace with the sophisticated
demands of global trade. The degree of expertise required within the
design and manufacturing of high quality and high performance valves
must be recognized as being highly competitive. Each valve, no matter
what its intended use may be, in every situation will be judged on merit
by its user in regards to the performance and efficiency it provides.

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2011-08-24

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