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Leaking radiator valve


 
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johnkk

from United Kingdom

Joined: 08 Mar 2008
Posts: 10
Location: West Midlands,
United Kingdom

PostPosted: Wed Aug 06, 2008 5:43 pm Reply with quote

I have a leak round the spindle of a rad valve, which stops if I turn it off.
It is a Belmont (at least 30 years old). Can I replace the o-ring without draining down? I would be grateful for information how to do it.
John
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wiggikins

from United Kingdom

Joined: 12 Sep 2007
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Location: Leeds,
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PostPosted: Wed Aug 06, 2008 8:17 pm Reply with quote

Renew it!
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lightning

from United Kingdom

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PostPosted: Wed Aug 06, 2008 8:28 pm Reply with quote

Yes you can replace it without draining it down.
To find out what o ring you need take the plastic head off the valve to a plumbers merchant before you begin the work.

On the old valves i think the rings are green.new ones are red
Wrap a towel around the valve body and undo the spindle {left hand thread}
A little bit of water might leak out at first but as you continue to remove spindle the water pressure will seal the valve.

2 o rings are housed in grooves in the spindle.prise off the rings using a tip of a screwdriver ,lubricate the spindle with a smear of silicone grease.slide new rings into position and replace the spindle.
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spacethegas

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PostPosted: Wed Aug 06, 2008 9:17 pm Reply with quote

as lightning says.
but you've got to be brave to try it & be prepared if a problem was to occur.
belmonts were the rolls royce of rad valves of their time costing five times the price of any other.
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buster52

from United Kingdom

Joined: 06 Aug 2008
Posts: 56
Location: Cumbria,
United Kingdom

PostPosted: Wed Aug 06, 2008 9:30 pm Reply with quote

something I used to do was to loosen the packing nut and cut a loop or two of cord insert it and re-tighten the packing nut, this will compress the original packing more and will work if the valve is not too worn
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johnkk

from United Kingdom

Joined: 08 Mar 2008
Posts: 10
Location: West Midlands,
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PostPosted: Thu Aug 07, 2008 10:06 am Reply with quote

Thanks for your comments.
When you say undo spindle LH thread, do you mean open tap and keep going (i.e. turn actual spindle), or do you mean undo the nut round the spindle?
Is the nut LH thread?
Does the actual spindle(i.e the rod that the plastic cover fits on) actually come out?
Thanks, John
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johnkk

from United Kingdom

Joined: 08 Mar 2008
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Location: West Midlands,
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PostPosted: Thu Aug 07, 2008 4:39 pm Reply with quote

Sorry if the last post is confused, but I would appreciate any clarification.
Thanks, John
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youth

from United Kingdom

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PostPosted: Thu Aug 07, 2008 7:12 pm Reply with quote

yes, nut normal thread ,undo anticlockwise and take off ,no water . spindle lefthand thread undo clockwise and remove slight water use towels and baking tray, a spring loaded valve will stop most of water as spindle is removed swop o rings with same colour red or green and replace everything in reverse
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johnkk

from United Kingdom

Joined: 08 Mar 2008
Posts: 10
Location: West Midlands,
United Kingdom

PostPosted: Fri Aug 08, 2008 4:34 pm Reply with quote

Sorry to be thick about this, but if spindle is LH thread, does this mean that if you turn off hard the spindle will come out?
How do you tighten it up again without turning on the radiator?
Thanks for taking the trouble to answer daft questions,
John
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youth

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PostPosted: Fri Aug 08, 2008 8:36 pm Reply with quote

under normal use the nut stops the spindle coming out , when changing the o rings removing the nut allows the spindle to be withdrawn it may sound like witchcraft but it does work , 5 min job .just need right colour o rings
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twgas

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PostPosted: Fri Aug 08, 2008 8:41 pm Reply with quote

its a bit scary first time you do it, but they are the best valves well worth repairing.
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johnkk

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Location: West Midlands,
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PostPosted: Sat Aug 09, 2008 4:28 pm Reply with quote

Thanks again, John
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giblets

from United Kingdom

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PostPosted: Sat Aug 09, 2008 4:55 pm Reply with quote

buster52 wrote:
something I used to do was to loosen the packing nut and cut a loop or two of cord insert it and re-tighten the packing nut, this will compress the original packing more and will work if the valve is not too worn


Not on a Belmont valve.
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assured heating

from United Kingdom

Joined: 17 Sep 2007
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PostPosted: Sat Aug 09, 2008 6:05 pm Reply with quote

Pegler do a kit for the belmont but its cheaper just to replace the whole valve icon_rolleyes.gif
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giblets

from United Kingdom

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Location: Surrey,
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PostPosted: Sat Aug 09, 2008 6:31 pm Reply with quote

Ye gods, Plumb Center charge 1.86 + VAT each for the replacement o-rings. icon_eek.gif That means I must have over 100 worth in my van. icon_razz.gif Best go and double check the alarm. icon_lol.gif
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