Boiler capped

[kris]

Sorry was a quick one there, I done some cp12s at a block 7 in total. All passed. Now another engineer has gone there 2 months later and capped the boiler for this. I now know the prv was opening slightly and leaking outside and the filling loop was stuck open... How this was re-pressurising the system I don't know as I always disconnect the loop and cap!!

Mind u dripping outside although faulty is not a risk if it can be opened manually, I agree with croppie I've never seen one not open in 20 years, ( I know it could be possible though )

 

[buckley plumb]

When doing a cp 12 the boiler rearly gets to max htg temp so not always possible to check expansion unless it rises quick

 

[AWheating]

7,13 is more for heat onlys converted to sealed systems. Its an engineers judgement i guess, was he/she ex BG?

 

[IDCHAPPY]

Never seen a prv fail to open.

Seen plenty not reseal afterwards.

More clarification needed.

This ^

Technically it isn't on the gas side of the boiler too.

But if the prv was capped then boom

 

[GrahamM]

Let me get this straight.
Expansion vessel burst or flat, filling loop connected & prp passing?
And for this some muppet capped the boiler?

 

[JG123]

Filling loop wasn't connected! And basically yes....

 

[Aquazone]

Drain half a rad, order parts, job done, no? Can't understand capping a boiler for this.....

 

[macackau]

Never seen a prv fail to open.

Seen plenty not reseal afterwards.

More clarification needed.

Had this once on a Worcester 440. When I got the PRV out to replace it is was full of sludge and all other kinds of muck. I'm guessing something has got in there to jam it and not allow it to open.

 

[REDSAW]

bollony

 

[Leo21]

Had this once on a Worcester 440. When I got the PRV out to replace it is was full of sludge and all other kinds of muck. I'm guessing something has got in there to jam it and not allow it to open.

How would carp stop it from lifting? Unless it was on the outlet side.