Boiler pressure keeps going down.

[johnnymac58]

Hello,

The pressure on my boiler keeps going down gradually and I have to top it up every month or two.

Is this likely to be a leak? And where should I be checking as I can't seem to find any water or leaks......

I've attached some pictures here which may help. It is a Vokera boiler and is in the kitchen:

Untitled

• johnnymac58
• 9 Dec 2009
• 1

Untitled

• johnnymac58
• 9 Dec 2009
• 1

Untitled

• johnnymac58
• 9 Dec 2009
• 1

I top up the pressure in the cupboard in the hallway (directly behind where the boiler is). The pipes from here run up and over to the other side of the hallway:

Untitled

• johnnymac58
• 9 Dec 2009
• 1

Untitled

• johnnymac58
• 9 Dec 2009
• 1

Untitled

• johnnymac58
• 9 Dec 2009
• 1

...and down into the other cupboard:

Untitled

• johnnymac58
• 9 Dec 2009
• 1

Untitled

• johnnymac58
• 9 Dec 2009
• 1

Any help or advice would be greatly appreciated.

 

[glasgowgas]

fill boiler to 1.5 bar and run ch and dhw what rise in pressure is there

if it goes above 3 bar, the PRV will lift dumping water outside

therby creating a sort of leak

if it does this your expansion vessel is dead or needs recharged

see FAQS at top of page

 

[kevplumb]

what a breath of fresh air

a poster that gives you some info

 

[dextrous]

what a breath of fresh air

a poster that gives you some info

Unlike your answer

 

[glasgowgas]

oh and either you live in the North Pole or your temp gauge is jiggered

 

[kevplumb]

what a breath of fresh air

a poster that gives you some info

Unlike your answer

wasnt an answer it was a comment

as for answer im with GG at the mo

try answering

my boiler wont give me hot water

thats about what you usually get

 

[johnnymac58]

fill boiler to 1.5 bar and run ch and dhw what rise in pressure is there

if it goes above 3 bar, the PRV will lift dumping water outside

therby creating a sort of leak

if it does this your expansion vessel is dead or needs recharged

see FAQS at top of page

When I top the boiler up and turn on both the heating and the water it only rises between 0.1 - 0.4 bar..... never gets near 3.

It seems to lose about this same amount of over a period of 1-2 months roughly.

I only ever have the water on for a few hours in the morning.

The heating itself is never on during the summer months and on for a few hours in the morning and evening in the winter months.

 

[kevplumb]

check the auto air vent

View media item 11231
View media item 17616
number 9

 

[mcmarshon]

Check for leaks from the elephants spout.