There were some questions about this many years ago but I will ask again. I am replacing all my rads over a number of months and have avoided draining down as I have kept the old TRV's and lockshield valves fitted as isolation. However, in one Instance I need to lengthen a pipe by about 100mm. Pipe is 8mm and as I am lengthening the pipe, I will replace the lockshield at the same time. The question is whether it is worth trying a freeze isolation before resorting to a full drain down. Job should be very quick, I will have the new valve ready with the right length of new pipe fitted. It will then just be a case of cutting the existing pipe and joining with a compression joint, hopefully a five minute job. Any advice welcome.
To freeze or not?
- Thread starter davecooper
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Drain down every time, easier to work with, less chance of anything going wrong, removing and replacing water with new inhibitor.
Andy
Andy
Given it's 8mm I would presume it's a sealed system? If so then if it was me I wouldn't drain down, I would just drain down the rad in question and as part of that de-pressurise the system, the flow from the feeds pipes would then normally just stop once the pressure's released (shut down the TRV's on the other rads). As it's compression then no need for dry pipework etc.
It's an new rad. Not even out of its packing. The old one has gone and the valves are shut and blanked. Got to repaint wall and skirting behind then fit new rad.
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Bung it.
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