Rising pressure/losing pressure

[dilalio]

If ev is now correctly charged on the air side - & holding, then you need to stop the leak at the filling loop by capping although this will need removing each time you need too top up (replacing would be better for water regs). You also need to be absolutely certain that the 'copper' relief pipe is not discharging! The condense pipe should be white and go into a drain or soak away via waste pipe if a long run to drain. Even though you replaced the PRV, they can become 'unseated' when activated (which yours is likely to have been due to the undercharged ev). This needs to be either checked for watertightness by trying to reseat or replaced.

 

[Happyunited]

If ev is now correctly charged on the air side - & holding, then you need to stop the leak at the filling loop by capping although this will need removing each time you need too top up (replacing would be better for water regs). You also need to be absolutely certain that the 'copper' relief pipe is not discharging! The condense pipe should be white and go into a drain or soak away via waste pipe if a long run to drain. Even though you replaced the PRV, they can become 'unseated' when activated (which yours is likely to have been due to the undercharged ev). This needs to be either checked for watertightness by trying to reseat or replaced.

The white condensate pipe runs to an internal SVP pipe.

The leak when I disconnect the filling loop doesn't account for the drop in pressure last night because this is below the two isolation valves on the F&R.

Is it worth turning the PRV so make sure it's ok? I replaced this only 2 weeks ago.

Am I wasting my time fitting an external expansion vessel?

Thank you for your reply.

 

[dilalio]

If water is not escaping via the PRV and you can see no sign of any water leak under the boiler, then you may have a leak in the HE which is flowing down and out of the condense!

 

[Happyunited]

If water is not escaping via the PRV and you can see no sign of any water leak under the boiler, then you may have a leak in the HE which is flowing down and out of the condense!

No leaks under the boiler. I have the bottom tray removed and it's clear to see if there is a leak.
There is definitely a wet patch outside each day, it seems pretty clear that this is where the water is escaping but why? I could maybe disconnect the condensate pipe before it goes to the SVP and monitor that?

What else would cause the PRV to open when the heating is off and discharge?

 

[abwooli]

I isolated the boiler from the central heating pipework and left it overnight and the pressure dropped so its definitely dropping from the boiler. Can this still be the expansion vessel even though there was no water coming from the valve? Any other suggestions?

Sorry for all the questions. I'm a single dad who sees his daughter 2 nights a week. I can't afford costly repairs especially so close to Xmas and would like to elimate all I can before paying for someone.

I personally think you should give your Boiler my friend, to some one who knows what they are doing.

Single dad or not, Safety comes fast above all the spare change you might want to save. The money won't mean nothing if some thing went wrong

In simple terms inside that boiler you have 240v, gas, water
And CO which is a silent killer

Hence being gas safe is very important or just knowing basic plumbing or electrics.

If you read some where in this forum lots of guys will tell u if u are not gas safe it not wise to open or take off a Boilr cover.

It's DIYnot not DIY dangerous

But your a grown man and its ur boiler and ur home so it's your call my Frnd best of luck.

Happy Xmas

 

[dilalio]

No leaks under the boiler. I have the bottom tray removed and it's clear to see if there is a leak.
There is definitely a wet patch outside each day, it seems pretty clear that this is where the water is escaping but why? I could maybe disconnect the condensate pipe before it goes to the SVP and monitor that?

What else would cause the PRV to open when the heating is off and discharge?

Sorry mate. Tinkering over. Call in someone who knows what they're doing. My advice is spent and it'll save you in the long-run. Ask around for a recommended Boiler fixer... local trade counter is the next place to ask if friends/family in locale don't know anyone!