The water in the central heating system (a conventional gas boiler,
half inch copper pipe, panel radiators system) in this house had no
inhibitor in it when I moved in. I immediately added inhibitor.

How do I check whether the system is partly blocked with corrosion
products?

On Feb 4, 2:28*pm, wrote:
The water in the central heating system (a conventional gas boiler,
half inch copper pipe, panel radiators system) in this house had no
inhibitor in it when I moved in. I immediately added inhibitor.

How do I check whether the system is partly blocked with corrosion
products?

Is that what they sell you guys in England, inhibitors. In the US
where I get to -25f we dont do anything on closed 100 yrs old + HW
boilers systems, you dont have to. If you want drane a few gallons at
the begining of every heat season. The oxygen will cook out. The
oxygen was cooked out in the first few hours of use when it was
installed. The boilers here last 20-60 years, the piping hundreds. If
you were adding water constantly from leaks then its a different issue
and the bottom of the boiler will scale up, a distinctive popping
sound will be heard as it heats. You never fill a boiler with new
water and dont run it for days, or the water is oxgenated.

ransley wrote:
On Feb 4, 2:28 pm, wrote:
The water in the central heating system (a conventional gas boiler,
half inch copper pipe, panel radiators system) in this house had no
inhibitor in it when I moved in. I immediately added inhibitor.

How do I check whether the system is partly blocked with corrosion
products?

Is that what they sell you guys in England, inhibitors. In the US
where I get to -25f we dont do anything on closed 100 yrs old + HW
boilers systems, you dont have to. If you want drane a few gallons at
the begining of every heat season. The oxygen will cook out. The
oxygen was cooked out in the first few hours of use when it was
installed. The boilers here last 20-60 years, the piping hundreds. If
you were adding water constantly from leaks then its a different issue
and the bottom of the boiler will scale up, a distinctive popping
sound will be heard as it heats. You never fill a boiler with new
water and dont run it for days, or the water is oxgenated.

AIUI, the main sludge problem with many UK systems arises from an
electrochemical reaction. A large number of systems here have cast iron
heat exchangers in the boilers, supplying steel radiators through copper
pipes. The stated purpose of inhibitors is to slow down the exchange of
of iron and copper ions but that can never be stopped completely.

Don't you have similar problems in the US, or do you use steel pipes?

--
Dave N