Water leaking from pipe above Megaflo cylinder

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Hi, new here with no plumbing idea and need help.
I've noticed a slow drip on the pipe above the boiler (cylinder) and a blue/green puddle on the boiler (cylinder) from where it's dripping. Also some weird foam like thing on the pipe.

Please see pictures attached.

Does anyone know what this could be and how I'd fix the issue?

Thanks in advance for the help!










 
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Looks like the pipe needs nipping up.

Take another picture with the insulation removed.

Andy
 
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Looks like the pipe needs nipping up.

Take another picture with the insulation removed.

Andy
Thanks for the quick response! I've added some more pictures
 

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Looks like someone has had difficulty trying to seal that joint previously ,judging by the presence of PTFE tape showing.
 
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Ok, you have the tools.

You would need to tighten the nut, place spanner on the nut and a spanner on the flat sides of the lever valve, You would then need to hold the spanner on the lever valve tightly and then pull towards you on the other spanner, being careful to have the same pressure on both spanners. Only turn it slightly.

Andy
 

DP

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Looks like someone has had difficulty trying to seal that joint previously ,judging by the presence of PTFE tape showing.

Wait till the DIYers see this thread. Then it will be game on starting with installer of that cylinder should be tarred and feathered followed by stoning in the town square. Never mind that will be no use to the poster in getting a suitable Response.
 
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I've tighten it a bit and seems to have stopped the drip. Thanks for the help.

Another question, what should I do/not do about the blue/green dried up stuff on the top and sides of cylinder (pics attached)?
 

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How easy was it to tighten was it quite loose?

Looks like you might be in a very hard water area, that looks like limescale/CaCl2 by the looks of the corrosion on the copper. Do you have a water softener? Just clean it up with a limescale cleaner and a green pad.

Another thought is why there is actually a valve on that side of the unvented with the lever still attached. Not exactly wrong but it shouldn't be needed, there should be a stop tap/valve on the inlet side.
 
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Quite common to have a valve there, you get immediate hot water isolation opposed to wasting hot water waiting for the pressure inside the cylinder to drop with only isolating the cold water inlet valve,
also isolating the valve on the hot water outlet you would still get balanced cold water at the basin mixer taps in the bathrooms if any work was ever getting done on the hot supply pipework.
 
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Quite common to have a valve there

Have to disagree there ... I certainly wouldn't say it's common and I've serviced more than I care to remember, I'd never fit an isolation valve on the outlet, just another valve for the the user to play with, on an unvented system .

The amount of hot water wasted @ depressurising is very little IME and to be honest any balanced cold wouldn't probably be used anyway (brushing teeth maybe) as invariably it would be on a shower/bathroom mixer and the other colds would normally be from the mains.
 
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I said basin mixer, all mixer taps cold water should be on the balanced cold, didn't you know that?,
also some people wash their hands after visiting the toilet too.

more than I care to remember

seems to be a favourite saying in your posts.
 
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didn't you know that?,
.
dohhh...nope :confused::LOL: Actually they don't but that's another discussion
seems to be a favourite saying in your posts

And, so what?? what's that got to do about anything to do with this post??

Do you really want to be petty and turn this into an argument over an OP's post because someone disagrees??

too much of this pointless crap starts in here sometimes, it really does
 
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