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 Post subject: Leaking Drain Valve
PostPosted: Sat Jun 23, 2018 1:22 pm 
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Hi Chaps,

Typically I've discovered half-way through fitting a new laminate floor that 3 radiators are leaking slowly from the drain valve. Only slowly dripping but no good for the floor.

Would appreciate any tips you might have on how to fix? Tips for an absolute amatuer preferred!

Many thanks,

Simon


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 Post subject: Re: Leaking Drain Valve
PostPosted: Sat Jun 23, 2018 4:32 pm 
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You should only need one drain off valve, so 2 of the 3 can be replaced with an elbow. As they all appear to have been gloss painted the only real option is replacement, unless you have experience of soldering pipes get a plumber in to sort it.

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 Post subject: Re: Leaking Drain Valve
PostPosted: Sat Jun 23, 2018 5:14 pm 
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SC7777, question. The 3 pictures, are they the same rad?

And which bit is actually leaking?

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 Post subject: Re: Leaking Drain Valve
PostPosted: Sat Jun 23, 2018 5:51 pm 
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Back to basics, gave you tried tightening the drain cock?

If that won’t work the simplest thing would be to replace the rubbers in them.

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 Post subject: Re: Leaking Drain Valve
PostPosted: Sat Jun 23, 2018 6:42 pm 
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someone-else wrote:
SC7777, question. The 3 pictures, are they the same rad?

And which bit is actually leaking?


Its the same rad - 2 are in the living room and 1 in the hall (which is the one in the photos)

Its leaking from the bit that the water escapes from when the valve is opened.


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 Post subject: Re: Leaking Drain Valve
PostPosted: Sat Jun 23, 2018 6:43 pm 
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gas4you wrote:
Back to basics, gave you tried tightening the drain cock?

If that won’t work the simplest thing would be to replace the rubbers in them.


Tried that and no luck unfortunatey. I take it you would need to use a torch to remove the valve?


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 Post subject: Re: Leaking Drain Valve
PostPosted: Sat Jun 23, 2018 7:46 pm 
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SC7777 wrote:
gas4you wrote:
Back to basics, gave you tried tightening the drain cock?

If that won’t work the simplest thing would be to replace the rubbers in them.


Tried that and no luck unfortunatey. I take it you would need to use a torch to remove the valve?

Are you saying that you have replaced the rubber washer as gas4you has suggested.

https://www.diy.com/departments/plumbsu ... 0wod9DYN9Q

Have a look to make sure there are no bits of old perished rubber or other debris stuck to the mating surfaces before you fit the new washer and reassemble.

If it's dripping from the valve outlet (the bit where you connect the drain hose) then there's no reason why a new washer should not fix the problem, unless the mating surfaces have been damaged in some way.



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 Post subject: Re: Leaking Drain Valve
PostPosted: Sat Jun 23, 2018 9:11 pm 
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PLB wrote:
SC7777 wrote:
gas4you wrote:
Back to basics, gave you tried tightening the drain cock?

If that won’t work the simplest thing would be to replace the rubbers in them.


Tried that and no luck unfortunatey. I take it you would need to use a torch to remove the valve?

Are you saying that you have replaced the rubber washer as gas4you has suggested.

https://www.diy.com/departments/plumbsure-rubber-drain-valve-washer-pack-of-2/178435_BQ.prd?utm_source=google_cpc&utm_medium=shopping&utm_campaign=PX_GSC_EPHC_+_Generic&ppc_type=shopping&ds_kids=92700029894064705&gclid=Cj0KCQjw37fZBRD3ARIsAJihSr1KoLSdt4sukr5w6etYy17-L_VAG1C0EjU_VFRqrv3AWaXBjDyt0LEaAsjyEALw_wcB&gclsrc=aw.ds&dclid=CKv1hrq26tsCFQkg0wod9DYN9Q

Have a look to make sure there are no bits of old perished rubber or other debris stuck to the mating surfaces before you fit the new washer and reassemble.

If it's dripping from the valve outlet (the bit where you connect the drain hose) then there's no reason why a new washer should not fix the problem, unless the mating surfaces have been damaged in some way.


Sorry no I meant I tried tightening the valve and the leak has continued!


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 Post subject: Re: Leaking Drain Valve
PostPosted: Sat Jun 23, 2018 10:45 pm 
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Replace the rubber washers. Usually you buy them in a blister pack of about 8 or 10.

Either drain down system and replace or bung the cold feed and cap the vent then do it.

No you don’t need any kind of torch or soldering, the drain cock is not removed, just undo the internal bit and replace the rubber washer.

If you don’t feel up to it I would have thought a minimum attendance fee if around £70-£90 + vat would cover it.

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 Post subject: Re: Leaking Drain Valve
PostPosted: Sun Jun 24, 2018 9:53 am 
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gas4you wrote:
Replace the rubber washers. Usually you buy them in a blister pack of about 8 or 10.

Either drain down system and replace or bung the cold feed and cap the vent then do it.

No you don’t need any kind of torch or soldering, the drain cock is not removed, just undo the internal bit and replace the rubber washer.

If you don’t feel up to it I would have thought a minimum attendance fee if around £70-£90 + vat would cover it.


Thanks - I take it the rubber washers are standard size? e.g. this would be the same

https://www.screwfix.com/p/arctic-products-mt-drain-cock-tap-washers-5-pack/6666j?_requestid=112421
(sorry it won't let me make it a url!)

I will drain the system - I have topped it up before but never had to refill completel. Would I need to put inhibator back into the system?


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 Post subject: Re: Leaking Drain Valve
PostPosted: Sun Jun 24, 2018 10:15 am 
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SC7777 wrote:
Would I need to put inhibator back into the system?


Yes, because you will be letting all the current inhibitor out.

The washers SC7777 linked to are These ones

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Take it easy, a forum is only a collection of opinions. Above, are mine.

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.

If gloom had a voice, it would be me. :mrgreen:

:idea1: How to post a picture on this forum Click here



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 Post subject: Re: Leaking Drain Valve
PostPosted: Sun Jun 24, 2018 10:57 am 
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I must add that there is a very slight chance the the part of the valve that you undo and remove may split into two halves leaving the bottom half inside, impossible to remove.

This is quite a rare occurrence but has happened to me a couple of times.

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 Post subject: Re: Leaking Drain Valve
PostPosted: Sun Jun 24, 2018 12:38 pm 
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gas4you wrote:
I must add that there is a very slight chance the the part of the valve that you undo and remove may split into two halves leaving the bottom half inside, impossible to remove.

This is quite a rare occurrence but has happened to me a couple of times.


Thanks for the heads up, knowing my luck this will definately happen :lol:

Fortunately don't need the heating at the moment just the hot water!


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 Post subject: Re: Leaking Drain Valve
PostPosted: Sun Aug 12, 2018 3:24 pm 
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Hello again,

I've tried unscrewing the brass nut and it eventually stops, rather than coming completely out.

I was expecting to remove this and the rubber washer to be inside - any ideas?

Thanks,
Simon


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 Post subject: Re: Leaking Drain Valve
PostPosted: Sun Aug 12, 2018 7:35 pm 
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You have to undo the square brass bit then undo the knurled circular bit that it goes into with a pair of grips.

Yours is covered in paint.

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