In article , Heliotrope Smith
scribeth thus

"A.Lee" wrote in message
.. .
I need to drain down a hot water system soon to fit a new sink (no stop
cocks at all on the hot water side).
To save time, would buying one of the £9ish pipe freezing sprays work
for the 5 - 10 minutes that the 15mm pipe is likely to be open while an
isolator is fitted?
If so, then it could save me a hour waiting for the drain down.
Thanks
Alan.

No need to go to the expense of freezer for this job.

If there is no isolator from cold tank to cylinder (unusual) then just make
up a bung, roll up your sleeve and insert it into the cold outlet to the
cylinder inside the tank. Open hot tap at sink and hot tap upstairs to drain
off pipework and cut and fix isolator. Cost? Nil. Time? A few minutes.



Tampax come to mind anyone?, at least its on a retrieval string;?....
--
Tony Sayer