John Rumm wrote:
The Medway Handyman wrote:

Do you have to solder? For grafting bits onto an existing system, I
find that a service valve (full bore) and a pushfit fitting of some
sort (cuprofit look almost as neat as capillary) will let you cut
into a "live" system and not lose more than a cup full of water. You
can then extend at your leisure and use the valves to finally bring
the new bit online.

By 'live' do you mean full of water under header tank pressure?

Yup, or on a sealed system - just drain a little water from it to drop
the pressure before you start. (a couple of litres will normally be
enough).

My preferred technique is have the fitting and valve ready assembled,
and use a pipe cutter on the offending pipe (close to somewhere like a
rad valve so that there will only be water flow from one direction).
Once it starts to hiss, cut a bit further, and then give a sharp
wiggle to snap off the pipe, placing your thumb over the wet end as
you do. Now pick up the prepared fitting, and swap its position for
your thumb. Finally wipe your glasses to remove the splashes! ;-)

(Old towel under the work area of course!)


Who dares wins huh?

I'll bear that in mind...



--
Dave - The Medway Handyman
www.medwayhandyman.co.uk