Hi,

I have over 25 years old central heating with Glow Worm Boiler. It is
working fine and there are two water pumps. I intend cleaning the
radiators and pipes and removing sludge from the system.

What treatment should I give to water circulating in the system? How
many days should I leave the chemicals to work?

There is some rust showing on some radiators and I would like to change
them with the new. They are old British standard threads and now we
have metric threads. Any problem it would cause?

House is a large 4 bedroom house with kitchen, garage, dining and bath
room. I intend putting power shower in the bathroom.

Your advice would be much appreciated. I shall be visiting my local
stores such as B&Q stores for assistance and Graham central heating
expert.

Rajinder

"Ch. Rajinder Nijjhar Jatt" wrote in message
news:54Npc.11813$7S2.3609@newsfe1-win...
Hi,

I have over 25 years old central heating with Glow Worm Boiler. It is
working fine and there are two water pumps. I intend cleaning the
radiators and pipes and removing sludge from the system.

What treatment should I give to water circulating in the system? How
many days should I leave the chemicals to work?

There is some rust showing on some radiators and I would like to change
them with the new. They are old British standard threads and now we
have metric threads. Any problem it would cause?

House is a large 4 bedroom house with kitchen, garage, dining and bath
room. I intend putting power shower in the bathroom.

Your advice would be much appreciated. I shall be visiting my local
stores such as B&Q stores for assistance and Graham central heating
expert.


Most large builder's merchants or plumbing suppliers will sell you the stuff
for cleaning a heating system and it comes with full instructions. When
you've read them you may change your mind. The stuff is a weak acid. You
put it in the system and run the heating flat out for about 24 hrs, then
have tio flush it clean for ages. The acid will seek out every weakness so
if you radiators really are rusty there is a fair chance they will start to
leak, so be prepared to do some work,

Once the system is cleaned it needs Fernox in it to inhibit further
corrosion.

Norman Billingham wrote:

Most large builder's merchants or plumbing suppliers will sell you the stuff
for cleaning a heating system and it comes with full instructions. When
you've read them you may change your mind. The stuff is a weak acid. You
put it in the system and run the heating flat out for about 24 hrs, then
have tio flush it clean for ages. The acid will seek out every weakness so
if you radiators really are rusty there is a fair chance they will start to
leak, so be prepared to do some work,

Once the system is cleaned it needs Fernox in it to inhibit further
corrosion.



Different flushing agents stay in the system for different times, e.g.
the Fernox stuff that I am about to add specifies 1 week, whereas the
previous lot (from B+Q) specified 2 weeks.

Richard

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Real email address is RJS at BIGFOOT dot COM