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PostPosted: Fri Oct 06, 2017 11:16 pm 
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Hello Folks,

New here (see welcome post) :hello2:

Sorry this is probably a stupidly simple one to start with, but today, stripping wallpaper in the hallway, I attempted to remove the radiator there (after watching several YT videos and thinking it looked quite simple) BUT!...

The radiator has a thermostatic valve on the right side, and a drain off valve on the pipe underneath it, but the problem is, the Lock-Shield valve on the left (covered with a white plastic knob) I cannot remove the knob, for love nor money! In fact, I have been around the whole house, and I cannot remove any of them! Am I doing something wrong???

It is a very old central heating system. I have tried on the radiators where I currently live, and sure enough, the white caps just lift off, like in the videos, exposing the lock-shield valve. They are a different shape at home though. The ones here, I can get a good grip of, as they widen at the top. The ones I can't remove actually narrow at the top, like an egg. I tried prizing one off with a claw hammer, and the darn thing still didn't budge.

So, I clockwise turned the end of the drain-off valve, thinking that was it instead, and just turned the thermostatic one off. I opened the nut near the thermostatic valve and put a container under it, but the water ran for around half an hour. Inexperienced and guessing, I took a punt that this was not right, and did up the bolt, but before doing so, I opened the air release at the top with my radiator key, and water spurted out under quite some pressure! I did it back up, convinced that something was not right, and gave it up as a bad job.

So basically, HELP!?

Best Wishes,
Gary.


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PostPosted: Fri Oct 06, 2017 11:39 pm 
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photos will show more but the valves might not belock shields. do the valves have a screw head showing, usly you just pop th shield off after removing the screw. but i think ive seen the old fashioned caps youve got.ill wait for the photo.


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PostPosted: Sat Oct 07, 2017 10:46 am 
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Hey Wes,

Thanks for this. Picture included that I took yesterday. I'll take more of a close up later today, in case needed.


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PostPosted: Sat Oct 07, 2017 3:27 pm 
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I think a closer picture would help, one looking at it at an angle with the top showing.

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Which is correct? Metre or Meter? Click the link. to find out more.

No such thing as "Thou shalt put this wire here, Thou shalt put that wire there" .............Take a picture BEFORE you do the job.

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PostPosted: Sat Oct 07, 2017 3:34 pm 
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There are some caps that have a screw in the top holding them on so check that this has not been painted over so you cannot see it. Most caps are push ons so pry one off and see how you go. If it breaks see here https://www.radcaps.co.uk/pages/radiator-caps-fitting

DWD



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PostPosted: Tue Oct 10, 2017 6:34 pm 
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Thanks folks, I looked and there was indeed a screw! All of the rad caps were covered in a layer of crud, thus obscuring the elusive piece of threaded metal!

Unfortunately, having removed the Rad, I now have a slow leak coming from the underside of the nut under the valve. Any suggestions on what to do?

Thanks in advance - more questions on their way! :thumbright:


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PostPosted: Tue Oct 10, 2017 6:38 pm 
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Gizzle wrote:

Unfortunately, having removed the Rad, I now have a slow leak coming from the underside of the nut under the valve. Any suggestions on what to do?

:thumbright:


Probably loosened a bit undoing the valve . Carefully tighten it ... You'll probably need an adjustable spanner on the nut and another on the valve to hold it steady. Do not over tighten !!!

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PostPosted: Wed Oct 11, 2017 9:18 pm 
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wine~o wrote:
Gizzle wrote:

Unfortunately, having removed the Rad, I now have a slow leak coming from the underside of the nut under the valve. Any suggestions on what to do?

:thumbright:


Probably loosened a bit undoing the valve . Carefully tighten it ... You'll probably need an adjustable spanner on the nut and another on the valve to hold it steady. Do not over tighten !!!


Thanks Wine-O. I did tighten it as much as possible at the time, being very careful, but it is still leaking. I think the nut needs removing and replacing with PTFE tape or jointing compound, so I was asking how to do that, really. I'm guessing I'd need to drain the whole system from another point or turn the water off (cannot find stopcock though!). Would you know which would be the best course of action?


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PostPosted: Wed Oct 11, 2017 9:23 pm 
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Turn the valve off then you will be able to carefully undo the top nut (stuffing gland), then you can poke a few turns of PTFE down to the bottom of the spindle before popping the gland back on and gently opening the valve

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PostPosted: Wed Oct 11, 2017 9:31 pm 
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This sort of thing :salute:



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donnas-dream-house-charity-t52110.html


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PostPosted: Thu Oct 12, 2017 11:56 am 
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Thanks very much, Razor! I will have a go :thumbright:


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