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Temporary radiador removal on Combi-system

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diymatt

from United Kingdom

Joined: 08 Apr 2007
Posts: 3
Location: London,
United Kingdom

PostPosted: Sun Apr 08, 2007 9:41 am Reply with quote

Hi,

Can I ask for some advice?

I have a towel radiator in my bathroom on my combi-system. I need to remove the radiator for a few days but still be able to run the rest of the system. The radiator will eventually need to be re-connected.

I have shut off the valves and removed the radiator. Once the boiler pressure drops to zero the water leakage stops.

As soon as I increase the pressure the pipes start leaking again. How do I get the hot water (and preferably the heating) back on without re-connecting the radiator?

Thanks,
Matt
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breezer

from United Kingdom

Joined: 03 Jan 2003
Posts: 23328
Location: Sussex,
United Kingdom
Thanked: 27 times

PostPosted: Sun Apr 08, 2007 9:45 am Reply with quote

i should think it would help if we knew which pipes that leak.

if its from where the towel rad was the valves are not 100% shut, if its the rad valve nuts where the towel rad was tighten them
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namsag

from United Kingdom

Joined: 12 May 2004
Posts: 9909
Location: United Kingdom
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PostPosted: Sun Apr 08, 2007 9:47 am Reply with quote

I take it you mean it is leaking from the open part of valve now it is not connected.. Either try turning valve off a wee bit harder or buy a couple of blanking caps till rad ready to go back on
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diymatt

from United Kingdom

Joined: 08 Apr 2007
Posts: 3
Location: London,
United Kingdom

PostPosted: Sun Apr 08, 2007 10:02 am Reply with quote

It leaks from the valve on the pipe that goes into the radiator. If I shut the valve off further will that stop it leaking? Is it possible to have the radiator off and the valves shut off but still run the boiler with a sealed combi-system?

Thanks
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namsag

from United Kingdom

Joined: 12 May 2004
Posts: 9909
Location: United Kingdom
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PostPosted: Sun Apr 08, 2007 11:29 am Reply with quote

You can try closing them more but becareful not to tighten it passed the f##k it point . This is where you think you can get a little bit more on it and the shaft shears off followed by you saying f##k it why did i do that
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diymatt

from United Kingdom

Joined: 08 Apr 2007
Posts: 3
Location: London,
United Kingdom

PostPosted: Sat Apr 14, 2007 12:23 pm Reply with quote

Thanks for your advice. I tightened the valve a bit further and it now no longer leeks.

However, I now have a new problem! icon_sad.gif

Once the radiator valves were capped off, I went back to the boiler to re-pressurise it. I used the loop to get it into the green zone and then the pressure lept to c. 3.5 bars. I have tried undoing the valve on the removed radiator and letting water out. The pressure goes down but as soon as I shut the valve again it goes back even higher than before.

What can I do?

Thanks
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gas4you

from United Kingdom

Joined: 23 Feb 2007
Posts: 17583
Location: Norfolk,
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PostPosted: Sat Apr 14, 2007 3:11 pm Reply with quote

Sounds like the filling loop valve is not shutting properly.
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ijc

from United Kingdom

Joined: 17 May 2005
Posts: 41
Location: Sheffield,
United Kingdom

PostPosted: Sat Apr 14, 2007 7:33 pm Reply with quote

Hi

I'm no plumber, just a DIYer, but had the exact same problem you describe. After refilling, the pressure just kept rising...

To resolve I just had to keep tweaking the tap on the filling loop, and then monitor the pressure for a while. You can kind of feel when it closes, but the tiniest movement just lets water in again and up goes the pressure. Very fiddly, very annoying, but worth persevering before you call a plumber.

I also think your boiler ought to vent the excess water if the pressure gets too high, so wouldn't worry too much about that.

Good luck!

Ian
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saleem

from United Kingdom

Joined: 22 Oct 2005
Posts: 260
Location: Yorkshire,
United Kingdom

PostPosted: Sat Apr 14, 2007 11:23 pm Reply with quote

gas4you wrote:
Sounds like the filling loop valve is not shutting properly.
You are right filling loop valve is culprit because i had exactly same problem.I turned the valve on full off position and opened the filling loop,water was still leaking.I turned it touch to open side and it stopped leaking.Filling loop isolater valve needs changing.
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