In an earlier contribution to this discussion,
Pecanfan wrote:

I've got one more plumbing question that I'm sure I'll get an instant
answer to on here :-) - I've look through the archives and can't
really find much on the subject.

In the process of installing a new bathroom, from scratch, I need to
take a feed for the hot and cold water from some existing pipes under
the floor (which used to lead to the old kitchen taps). The trouble
is I'm in an upstairs flat so can't afford to risk water spillage
when I cut into these pipes.

I could attach a hose to the lowest tap in the house, stick it out the
window and attempt to siphon the water out the system, but I really
can't see this working. I haven't heard great things about pipe
freezing kits, and even then I still need an area of dry pipe to
solder the new connections onto.

Any tips for a task like this?

Cheers,

Andy

As far as cold is concerned, turn off the water at the main stopcock
(probably under the kitchen sink) and open a downstairs *and* an upstairs
tap. The pipework will drain through the downstairs tap, with air being
admitted through the upstairs tap.

With the hot system, you have to remove the pressure by stopping cold water
getting from the header tank into the hot cylinder. Hopefully there will be
a tap or gatevalve in the cold feed to the cylinder (the one which comes
down from above and goes into the *bottom* of the cylinder. If so, turn that
off and then open an up and a down hot tap - as for cold - to drain the
pipework. If there *isn't* a valve in the cold feed, you'll need to reach
down into the header tank and stuff a tapered cork into the outlet pipe.
[Choose one of a size which leaves enough to catch hold of to pull it out
again when you've finished!]
--
Cheers,
Set Square
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