sudden drop of pressure when boiler kicks off

[drvictor]

Hi
When boiler kicks off pressure drops roughly 0.5Ba and then gradually goes back to initial level (usually pressure sits around 1.1-1.2 BA to drop suddenly to 0.7-0.6 ba) Is that normal - see video

http://youtu.be/v2oH0rSUQMo

I had plumbers regarding that twice recently and was told it is normal
?? is it??

Many thanks for your advice
Victor

http://youtu.be/v2oH0rSUQMo

 

[ianmcd]

What do you mean when you say "boiler kicks off" do you mean when the demand for heat or HW stops ? or when a demand starts ?

 

[philplumber]

this is normal and is due to the pump starting up which makes the pressure fluctuate a little.

 

[drvictor]

What do you mean when you say "boiler kicks off" do you mean when the demand for heat or HW stops ? or when a demand starts ?

i meant, when boiler starts/switches on for heating
Victor

 

[jeff the gasman]

Normal, as pressure gauge is on return as is pump.

 

[drvictor]

thanks for replies, feel relieved that is normal after a few repairs recently

 

[ianmcd]

Perfectly normal and you shouldnt be concerned

 

[newbuildinstaller]

Sooooooooooooooooooooooooooooooo

two plumbers that have been in your house and looked physically at the layout and pressure flutuations tell you its fine... but you dont believe them

But

People on a forum tell you its normal and its gospel!! he he

 

[neiltheplumber]

We live in a world of paranoia!

 

[drvictor]

Sooooooooooooooooooooooooooooooo

two plumbers that have been in your house and looked physically at the layout and pressure flutuations tell you its fine... but you dont believe them

But

People on a forum tell you its normal and its gospel!! he he

No - I had plumbers and heating engeneers from company X literally 14 times in 6 month in new house, as they could not find a leak, changed different vessels, pumped expansion vessel, put sealants etc, eventually found a leak, so I have very little trust in those people.. so since noticing this happening with gauge recently (was not happening before) and hearing from them it's ok, I dont think it's strange that I ask for second opinion??

Anyway thanks for all replies