boiler pressure down to 0 when not on

[NEILCMUSIC]

My boiler pressure goes down to 0 overnight , it stays on all day at about 2.5 , however in the morning after not being on it does not re pressurise , I have bought a bicycle pump to try and re pressurise system , however the pin in the middle of the valve wont go in , apart from wd40 , any suggestion? ps boiler holds pressure after being topped up via fillg loop.

 

[nogoodatfaultfinding]

If you started pumping today with a bike pump you would still be there next week trying to get up to pressure required.
Is you PRV pipe leaking?

 

[ScottCheg]

You are re-charging the vessel with an open end arent you?

 

[BingoBongo]

renew the shraeder valve on the exp vess-pin in air vent bit(try halfords or bicycle shop for shraeder remover)

check and see if the prv is constantly dripping-copper pipe sticking out wall

report back

 

[NEILCMUSIC]

managed to open valve , pressurised with heavy duty foot pump (thank you nogoodatfaultfinding for your advice) and hey presto , its works great and is almost silent , well see in the morning if its managed to keep pressure , thanks all.

 

[NEILCMUSIC]

crap , got up this morning , hot water , however no heating , pressure is back down to zero , is it possible leak in pressurised system or do i need to keep topping it up with air , weird thing is if I press tyre type valve it is still presurrised. Last night I pumped air up to 1.5 and opened loop so it went to 2.5 , was I wrong to do this? didnt want to keep pumping air as was getting difficult and didnt want to over inflate.

 

[Agile]

You must pressurise with an open system.

Read the FAQ on this site and do what it says !

Tony

 

[ScottCheg]

You are re-charging the vessel with an open end arent you?

so......

 

[NEILCMUSIC]

works great now , thanks for all your help guys!!