Leaking boiler connection

[Tonythecat]

Hi ive got a leak to the cold feed to my boiler can anyone advice if this joint should have some type of washer or joint compound
Any advice is very much appreaciated

 

[jj4091]

Yes should have a fibre washer

 

[gary plumb]

2nd that

 

[ChrisJP]

There may be the remnants of the old fibre washer trapped in the nut that you screw onto the treded pipe. That needs to be dug out before you insert a new fibre washer. The outside diameter of that must be of a size to fit closely, but not tightly, into the nut.

 

[Tonythecat]

There may be the remnants of the old fibre washer trapped in the nut that you screw onto the treded pipe. That needs to be dug out before you insert a new fibre washer. The outside diameter of that must be of a size to fit closely, but not tightly, into the nut.

Thanks for the replies. When i push the nut down i can see the top of the inner part and its just metal definately no remnants of any washer

 

[Harry Bloomfield]

Thanks for the replies. When i push the nut down i can see the top of the inner part and its just metal definately no remnants of any washer

It has probably made its way into your heating system.

 

[Tonythecat]

It has probably made its way into your heating system.

Directly above it is the dhw flow turbine which has a mesh so it wouldnt get through but no sign of owt on the mesh ?

 

[Harry Bloomfield]

Directly above it is the dhw flow turbine which has a mesh so it wouldnt get through but no sign of owt on the mesh ?

It must be somewhere in the fill pipe then. Can you try to flush it out?

 

[Tonythecat]

It must be somewhere in the fill pipe then. Can you try to flush it out?

Checked and nothing in the filling loop. Wonder if it was never fitted with one. Found this pic which is nearest i can find and it shows 2 washes and an olive so obviuosly all 3 conections must require a seal

 

[Harry Bloomfield]

Wonder if it was never fitted with one.

I guess so. Unless they just splogged some sealant on the end face, and it washed out over time?

Found this pic which is nearest i can find and it shows 2 washes and an olive so obviuosly all 3 conections must require a seal

Top and bottom of that iso valve, would need the fibre washer.

 

[Tonythecat]

I guess so. Unless they just splogged some sealant on the end face, and it washed out over time?



Top and bottom of that iso valve, would need the fibre washer.

Green circle shows where leak is coming from. This is where it conects onto the thread that prodrudes from under boiler

 

[Harry Bloomfield]

Green circle shows where leak is coming from.

That was not what you originally said - you said it was the joint union, onto the base of the boiler.

If the is-valve is also leaking from the control knob shaft, you need to buy a new valve too.

 

[Tonythecat]

That was not what you originally said - you said it was the joint union, onto the base of the boiler.

If the is-valve is also leaking from the control knob shaft, you need to buy a new valve too.

No sorry. I thought id confused things as the picture is upside down. So the part that ive circled actually screw up onto the threaded bit that comes out of the boiler.its this joint that is leaking