we have a combi boiler that was fitted over a year ago and the whole system
had a power flush.
now all the rads work well and have their own thermostats.
recently the pipes upstairs are driving me nuts at bedtime by rattling at
is this air blocks?
Assuming that this noise is caused by air trapped in the pipes to the
upstairs radiators, and not from hot or cold water pipes (water hammer) to
the upstairs sink and bath, and not from expansion and contraction of pipes
and rads, you could try turning off all the downstairs rad valves, fully
open all the upstairs rad valves, and just run the upstairs rads for a while
in case this forces the air out. It would also be worth checking to see if
there is any air in any of the rads that needs bleeding out. If this problem
persists, and is due to trapped air, the cause of air entry needs to be
found and fixed.
Yes and No. i used plastic pipe fixers to separate and hold down the pipes
when i had the floors up and it has been quite for around 6 months, its just
the last few weeks that we have seen an increase in the noise (which yes you
could describe as "metallic tapping noise, very quick?"
On Mon, 29 May 2006 09:50:56 +0100, "Mark D. Smith"
Next time it happens, see if it comes from the thermostatic rad
valves. The valve seat is bouncing, causing the hammering effect. The
valve makes the noise but it is amplified by the radiator and sounds
like it is the whole rad that is making the noise.
Could be that the warmer weather has altered the flow through the
valves and caused the noise.
Come back if you can say that it is the thermostatic valves.
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