Please help! leaking boiler

[needadviceguy]

It is coming from behind the nut on the pipe on the far right, it's only a small leak.

Any ideas what could be causing it? we've had the heating on recently and the boiler is only about 4 years old.

Appreciate any advice.

 

[Alpha man]

It's a job for your gas safe service engineer!

 

[jonnyswamp]

It's below the boiler by the looks of it
Hold the valve with a pair of thin jawed adjustables and tighten the nut up
If this doesn't cure it, the system will need draining down and the joint re-made

 

[needadviceguy]

From the manual diagram it is called the Heating Flow Pipe 22mm

Could it just have come loose from expansion caused by having the central heating on?

I will get a plumber in but like to have some knowledge of it first.

 

[needadviceguy]

It's below the boiler by the looks of it
Hold the valve with a pair of thin jawed adjustables and tighten the nut up
If this doesn't cure it, the system will need draining down and the joint re-made

Hi, thanks for the reply. it is the Heating Flow Pipe, 22mm. Could it have come loose from heat expansion caused by having the heating on? was only serviced a year ago.

Is it not a job for a plumber?

 

[joni os]

Vaillant is good make and worth looking after. It could just be loose nut, but why it happened after 4 years could be a sign of increased internal pressure. It is also easy to see water on lower pipework when point of leakage is higher in system. Get your service engineer back. A leaky boiler can soon become a boiler beyond economic repair.

 

[needadviceguy]

Vaillant is good make and worth looking after. It could just be loose nut, but why it happened after 4 years could be a sign of increased internal pressure. It is also easy to see water on lower pipework when point of leakage is higher in system. Get your service engineer back. A leaky boiler can soon become a boiler beyond economic repair.

Hi, thanks for the response. The water pressure was quite low on it when I noticed the leak, probably caused by the leak.

When it was serviced last year we did have some work done on it too, think he put some new water inlet system in, so it's possible he didn't tighten things properly. Also we rarely had heating on last year cause it was so mild so perhaps that's why it's only happened now since the heating has been on more often.

Could such a leak be dangerous? I think it's due another service anyway.

 

[needadviceguy]

btw, is the Heating Flow Pipe the pipe that takes hot water to the radiators?

 

[Chalked]

View attachment 28315View attachment 28316

It is coming from behind the nut on the pipe on the far right, it's only a small leak.

Any ideas what could be causing it? we've had the heating on recently and the boiler is only about 4 years old.

Appreciate any advice.

Time flies. Think you will find that boiler is nearly 6 years old!

As for the leak. Somtimes they just start. It might just do with a tighten, but may need a drain down and re make with a smear or jointing compound. The compression rings on vaillants are vey hard.

 

[REDSAW]

a leak is when you wet yourself,
a weap is when you cry!

nut needs nipping up or drain down and new washer

 

[needadviceguy]

What would cause it to come loose though? that's what concerns me.

 

[REDSAW]

What would cause it to come loose though? that's what concerns me.

heat/cold contraction of metals in ambient environment

 

[needadviceguy]

Thanks for all your advice, has put me at ease a bit. I will try and tighten it and get it serviced asap.