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PostPosted: Fri May 18, 2018 11:51 am 
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how do I isolate radiaters fro hot water to reemove a rad


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PostPosted: Fri May 18, 2018 12:10 pm 
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Unless you have a weird heating system the domestic hot water will be separate to the water in the rads.

Turn off both radiator valves (thermostatic valves are best capped as well) and drain the rad, open the bleed valve while the rad is emptying.

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PostPosted: Fri May 18, 2018 12:10 pm 
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Radiators aren't connected to hw. Radiator should have valves or lockshields at each end, shut these off and the radiator can be removed, word of warning though radiator will be full of water.

Alternatively drain heating system down and then remove radiator.

If you're unsure, get a pro in
joetheghost wrote:
how do I isolate radiaters fro hot water to reemove a rad


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PostPosted: Fri May 18, 2018 5:26 pm 
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Isolating the lockshields and the thermostatic valves wont cut off the water in the pipes,so when I take off the rads complete with valvs and lockshields,how do I stop the water from coming out from those points. The thermostatic valves have a frost setting so when I turn them off a small amount of water still seep through


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PostPosted: Fri May 18, 2018 5:28 pm 
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Why are you removing the lockshield and valve?

Disconnect them from the radiator and just lift the rad off after draining. That way the pipes are isolated with valves still in situ.
joetheghost wrote:
Isolating the lockshields and the thermostatic valves wont cut off the water in the pipes,so when I take off the rads complete with valvs and lockshields,how do I stop the water from coming out from those points. The thermostatic valves have a frost setting so when I turn them off a small amount of water still seep through


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PostPosted: Fri May 18, 2018 6:03 pm 
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joetheghost wrote:
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ayjay wrote:
Unless you have a weird heating system the domestic hot water will be separate to the water in the rads.

Turn off both radiator valves (thermostatic valves are best capped as well) and drain the rad, open the bleed valve while the rad is emptying.

Just realisd I dont know what these caps are like.Exactly what are they.

If I disconnect these lockshields and valves leaving them connected to the pipes how do I drain the rads ,I would have no control over the water coming out.I'm obviously missing something here. I simply need to know how to drain the rads before disconnectimg them.


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PostPosted: Fri May 18, 2018 7:56 pm 
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You drain them by getting a bucket/try under the nut joining the valve to the rad, then opening it slightly and catching the water. As your try gets full, tighten the nut slightly, empty the tray and then repeat the process as before until the rad is empty.


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PostPosted: Fri May 18, 2018 8:48 pm 
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Or drain the heating system down fully

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PostPosted: Fri May 18, 2018 8:49 pm 
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Or drain the heating system down fully

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PostPosted: Fri May 18, 2018 8:53 pm 
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Watch this:

https://www.youtube.com/watch?v=BlTjyjeIWUM&t=346s

If you do want the lockshields off too you need to drain down. As you don't know what they are you probably don't want to remove them.


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PostPosted: Sat May 19, 2018 8:50 am 
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mods wheres my post from last night ? whats happening with my disapearing posts?


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PostPosted: Sat May 19, 2018 9:01 am 
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wes56 wrote:
mods wheres my post from last night ? whats happening with my disapearing posts?


So far as I'm aware you are the only member having this problem, so must be something your end.


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PostPosted: Sat May 19, 2018 12:42 pm 
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ayjay wrote:
Unless you have a weird heating system the domestic hot water will be separate to the water in the rads.

Turn off both radiator valves (thermostatic valves are best capped as well) and drain the rad, open the bleed valve while the rad is emptying.
ayjay wrote:
Unless you have a weird heating system the domestic hot water will be separate to the water in the rads.

Turn off both radiator valves (thermostatic valves are best capped as well) and drain the rad, open the bleed valve while the rad is emptying.


If I drain the rad this will lower the presssure meaning the hot water willl not work with the reduced pressur or wil lthe pressure be maintained if the lock shield and valve are closed off.


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PostPosted: Sat May 19, 2018 12:50 pm 
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joetheghost wrote:

If I drain the rad this will lower the presssure meaning the hot water willl not work with the reduced pressur or wil lthe pressure be maintained if the lock shield and valve are closed off.


If both valves are closed off the pressure in the heating system shouldn't change at all.

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