"AK" wrote in message
...

"IMM" wrote in message
...


Most new houses have a 12 month guarantee on all fittings. Check
this out.
If you suspect you have no inhibitor Sentinel X-100 for instance,
then
partially drain, install X-400 sludge remover, and then after
removing after
a few weeks in the heating season flush out twice and fill with
X-100. Best
do it now before corrosion takes hold.

that's a bit more extreme than I intended! The water that comes out
is completely clear so is it likely there is any sludge to remove?
it's only had 1 winters use.

Corrosion could have taken hold in that time, and almost certainly seems
that way. When corrosion is occurring hydrogen is produced. many think it
is just air.