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Will a new boiler work with old cast iron radiators?
Ruthie5
Posts: 203 Forumite
Hi, mu Mum and Dad have a Thorn M Gas boiler that was installed in the 1970s. It is either an M42, M54 or M74. One of the valves has gone, and so it started leaking gas. Someone has been out and switched off the gas supply to the house, so it is now all safe.
My Dad is happy to either get the boiler replaced, or (even better) get a spare part for the actual boiler. He's had a look online, but couldn't find the right thing.
If he gets the whole boiler replaced, the people who would do it are concerned that it may not work with their existing radiators. At the moment they have about 8 old cast iron radiators with those big 2" diameter pipes to carry the water around. In addition to this, there are about 4 modern radiators with small pipes at the back of the house.
It would be a real shame to take out these lovely radiators (and my Dad doesn't want the upheaval) but he has been advised that it wouldn't be a good idea to have a pressurised system with such an old set up.
If anyone could advise, I would be grateful.
many thanks, Ruthie
My Dad is happy to either get the boiler replaced, or (even better) get a spare part for the actual boiler. He's had a look online, but couldn't find the right thing.
If he gets the whole boiler replaced, the people who would do it are concerned that it may not work with their existing radiators. At the moment they have about 8 old cast iron radiators with those big 2" diameter pipes to carry the water around. In addition to this, there are about 4 modern radiators with small pipes at the back of the house.
It would be a real shame to take out these lovely radiators (and my Dad doesn't want the upheaval) but he has been advised that it wouldn't be a good idea to have a pressurised system with such an old set up.
If anyone could advise, I would be grateful.
many thanks, Ruthie
0
Comments
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Those lovely radiators will probably not be lovely inside.Not Again0
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If they are in good condition they should support it, however as above, with the age on top of the length of time left unused would make me cautious as to the internal structure of them, as they could have rusted to the point that only a little pressure would be enough to spring few leaks.
Worth a bob or two as scrap though
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Hi,
If you find the GC number on the data plate in the boiler, using it, you might find what you are looking for. I guess you mean the gas valve is faulty, probably letting by? If the boiler is a write off......
...No reason to change the rads unless there are obvious signs of corrosion /leaking.
You might want to change the valves though.
Open vented boilers are available.
I would flush the system through maybe with some x400 Sentinal. Then fit a Magnabooster 2 on the return to catch any further dirt.
GSR.Ask to see CIPHE (Chartered Institute of Plumbing & Heating Engineering)0
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