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leaky radiator

EN1GMA Avatar
6y, 1m agoPosted 6 years, 1 month ago
Got a leaky radiator guys. anyone know what to do or what the problem is to cause it? cost of fixing it,roughly?

Thanks for looking and hopefully helping guys.
EN1GMA Avatar
6y, 1m agoPosted 6 years, 1 month ago
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#1
iF ITS LEAKING AT THE JOINT JUST PINCH IT UP
#2
you need a new boiler , and all the rads need changing , i ll do it for around £4000 !!!!!!!!
banned#3
have you bled them recently and not done the valve up tight enough....check the bleed valve anyway.....also check the valve under the regulator cap where the water pipe joins the rad some need the cap unscrewing first to gain access to the valve.
#4
I love the way everyone assumes the OP is talking about a central heating radiator, for all we know it could be on their car! Probably is central heating though.

You need to ensure its the rad itself and not any joint even if its dripping from the bottom of the radiator it could be a joint still, so what I have done is wrap a piece of tissue around each joint and leave it a few hours then find which one is wet.

If its a joint try tightening it, if this doesnt work you will need PTFE tape (67p wilko's) isolate the radiator by closing both end valves have a shallow but largeish capacity bowl (needs to slip under the valve) undo the joint and have someone stick there finger over the hole while you wrap a couple of layers of the PTFE tape over the thread, quickly remove said persons finger (from the hole dummy, not their hand you aren't a triad) and fasten the joint up, re-open valves and test. If all is good top up water system as required.


It should go without saying turn the pump off first and let the system cool.
1 Like #5
Find the source of the leak. It will be the highest place with water for obvious reasons. Use thin tissue or toilet paper to trace it as it shows very clearly if it gets damp.

If it's the radiator you need to replace it. If it's a joint then you need to tighten and/or reseal. This is hard to do if you are inexperienced and is partly done by feel as well as having technical plumbing knowledge.

I would never try to fix a wet joint as it hardly ever works and often becomes worse if overtightened. I would remove the radiator and using ptfe tap or new olive (depending on where the leak is actually coming from) redo the leaking joint once it is dry.
#6
Gaffer tape.

/thread
banned#7
vaseline works well
#8
Get a plumber.
#9
harlzter
I love the way everyone assumes the OP is talking about a central heating radiator, for all we know it could be on their car! Probably is central heating though.You need to ensure its the rad itself and not any joint even if its dripping from the bottom of the radiator it could be a joint still, so what I have done is wrap a piece of tissue around each joint and leave it a few hours then find which one is wet.If its a joint try tightening it, if this doesnt work you will need PTFE tape (67p wilko's) isolate the radiator by closing both end valves have a shallow but largeish capacity bowl (needs to slip under the valve) undo the joint and have someone stick there finger over the hole while you wrap a couple of layers of the PTFE tape over the thread, quickly remove said persons finger (from the hole dummy, not their hand you aren't a triad) and fasten the joint up, re-open valves and test. If all is good top up water system as required.It should go without saying turn the pump off first and let the system cool.

Errm since when has PTFE tape been used for wrapping round compression and union joints???
Only to be used on male threads going into fittings.
What you want for stubborn leaks on unions and compression joints is a thin smear of pipe joint compound (boss white) on the face of the union and around the end of the pipe and olive on compression fittings.
#10
Thanks for the advice guys.

Someones coming round today to have a look but at least I'll know roughly what he's talking about thanks to your comments.
banned#11
Jumpingphil
harlzter
I love the way everyone assumes the OP is talking about a central heating radiator, for all we know it could be on their car! Probably is central heating though.You need to ensure its the rad itself and not any joint even if its dripping from the bottom of the radiator it could be a joint still, so what I have done is wrap a piece of tissue around each joint and leave it a few hours then find which one is wet.If its a joint try tightening it, if this doesnt work you will need PTFE tape (67p wilko's) isolate the radiator by closing both end valves have a shallow but largeish capacity bowl (needs to slip under the valve) undo the joint and have someone stick there finger over the hole while you wrap a couple of layers of the PTFE tape over the thread, quickly remove said persons finger (from the hole dummy, not their hand you aren't a triad) and fasten the joint up, re-open valves and test. If all is good top up water system as required.It should go without saying turn the pump off first and let the system cool.



And by doing this, you have just un-balanced all the radiators.
Not really worth attempting unless you know what you are doing.
You might fix the leak, or you might have made it worse by tightening too much, but you could also have left 90% of your house cold.

in what way would that unbalance the rads? Its an easy job and have done it myself many times when changing rads / replacing valves.

How else are you meant to do it then?

I use ptfe tape too oO

I certainly wouldnt pay a plumber to come and fix a leaky radiator. Probably about £60 just ti turn up then £50+ per part hour from thereon so could be looking at £100 just to tighten a bolt lol
#12
I went on the Homeserve 'how to do it vids' and they too used ptfe tape to fix the problem.

Even though ive seen the vids, with it being winter and having young kids, im just going to get a mate to come round and sort it for me as I dont want to have a go and end up messing it up.

Really appreciated for all the comments on here. Thanks one and all.
#13
Some really useful info in this thread. Sometimes the really common sense stuff is good to point out as not everyone will have had prior experience in dealing with a similar problem

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