DIYbanter - View Single Post

wrote in
oups.com:

While fitting a new radiator at friends house disovered there is
only one tank. So obviously any inhibitor added to the system could be
drawn off bit by bit via expansion into the hot water cylnder.Should
I either leave the system un-dosed (as it always has been) fit a
separate expansion tank ,theres easy access and plenty of room. Bearing
in mind the crud in most headers its unlikely anyone would drink from a
hot tap...but I think a mixer of crud and inhibitor would be Very
bad thing indeed. Ta, everyone

Sounds like a Primatic cylinder, where the circulating boiler output is
topped up from the clean water in the tank.

Dosing would be a very bad idea, replacing with a conventional cylinder and
Feed/expansion header prolly would; often though these were used because of
shortage of room, (or parsimony)

mike