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Old 17-02-2013, 09:08
TheMask
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Boiler is 2 years old. Once a month the boiler pressure needs to be increased. Checked the system completley and there are no leaks.

does a condensate boiler work this way or could there be another fault with it. No problem getting someone in to fix it but you hear stories of people being taken for a ride. Just after some ideas as what could be causing this problem



Thanks
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Old 17-02-2013, 09:24
soulboy77
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If it's losing pressure then something is leaking. The heating system includes all the pipework, expansion vessel, radiators, pressure release valves as well as the boiler.

I have had to replace two pressure release valves, perished rubber seals on a number of radiators caps and tighten some joints to the radiators on my 10 year old heating system. I put in a leak sealer for good measure as well.
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Old 17-02-2013, 09:28
TheMask
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I can assure you it's not leaking from anywhere. Had all new wood floors put in the house so I had all the pipe work replaced as the floors were up. All the rads are new and there is no sign of it leaking from the expansion vessel or any pressure realse valves
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Old 17-02-2013, 09:37
soulboy77
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If you only have to re-pressurise once a month then the leak is only a tiny one. It will be very hard to spot.
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Old 17-02-2013, 09:39
TheMask
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If you only have to re-pressurise once a month then the leak is only a tiny one. It will be very hard to spot.
Totally agree

wouldnt you think though, if it's leaking in the same place month after month I would see some signs of water/damp on the floor or in the boiler itself.
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Old 17-02-2013, 09:39
morganb1611
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Check is the pipe poking out of the wall is not leaking water when the boiler runs, place a bag over it and see if there's any water in it after a few hours of running. You will also find rad valves always leak a tiny amount of water, it just evaporates before you ever notice it so it is to be expected you have to top the boiler up ever year or so.

Don't just carry on topping the boiler up without finding the fault, fresh oxygen from the water being introduced ruins a system very quickly.
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Old 17-02-2013, 09:43
TheMask
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Check is the pipe poking out of the wall is not leaking water when the boiler runs, place a bag over it and see if there's any water in it after a few hours of running. You will also find rad valves always leak a tiny amount of water, it just evaporates before you ever notice it so it is to be expected you have to top the boiler up ever year or so.

Don't just carry on topping the boiler up without finding the fault, fresh oxygen from the water being introduced ruins a system very quickly.
Do you mean place the bag on the end of the pipe outside the wall..if so I know it's coming out that pipe as I checked it.

It is a strange one I must admit
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Old 17-02-2013, 10:11
Trajet
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What pressure do you top up to? If you are over filling then the relief valve with allow extra pressure to escape until a safe pressure is reached. We were advised to put a balloon on the pressure relief pipe to check for any water escaping through the valve when our water pressure kept dropping.
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Old 17-02-2013, 10:18
TheMask
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What pressure do you top up to? If you are over filling then the relief valve with allow extra pressure to escape until a safe pressure is reached. We were advised to put a balloon on the pressure relief pipe to check for any water escaping through the valve when our water pressure kept dropping.
1.5 bar or there abouts never higher
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Old 17-02-2013, 10:25
Sigurd
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Totally agree

wouldnt you think though, if it's leaking in the same place month after month I would see some signs of water/damp on the floor or in the boiler itself.
Do the central heating pipes run under the floor? If so, have you been able to check the complete run?

Shortly after this house was built I noticed that the boiler kept losing pressure. Eventually, after a lot of crawling around under the floors, I found that one joint had been badly soldered and was leaking.
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Old 17-02-2013, 14:33
Trajet
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1.5 bar or there abouts never higher
Our boiler manual recommends 0.7 bar.
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Old 17-02-2013, 14:40
Maxatoria
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Buy some cheap washing up liquid and test each joint as if theres even a small leak it should bubble but the problem is if the joint thats leaking is under the floor due to the having to lift up floors etc
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Old 17-02-2013, 19:34
fredster
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Boiler is 2 years old. Once a month the boiler pressure needs to be increased. Checked the system completley and there are no leaks.

does a condensate boiler work this way or could there be another fault with it. No problem getting someone in to fix it but you hear stories of people being taken for a ride. Just after some ideas as what could be causing this problem



Thanks
We've had one for ten years and has been a real problem. We have had british gas out ten times since october.luckily we have a contract with them and they come out each time, its been a night mare.
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Old 17-02-2013, 22:49
curvybabes
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i,m not sure you would see signs of water when you need to top the pressure up once a month, ive just had a new boiler installed 3 weeks ago and have had to top the pressure up twice, I can see the leak and its tiny (getting fixed this week) I doubt theres a drip hit the floor! theres a spray you can use to find leaks but its probaby only good if you suspect a certain area.
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Old 18-02-2013, 00:15
bart4858
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i,m not sure you would see signs of water when you need to top the pressure up once a month, ive just had a new boiler installed 3 weeks ago and have had to top the pressure up twice, I can see the leak and its tiny (getting fixed this week) I doubt theres a drip hit the floor!
There might more than one leak! I top up the pressure in my friend's house once or twice a week. There are three leaks that I know of, one of them about one drop a minute. But they are also variable. However, until a couple of weeks ago, I'd only known about two.

(Sometimes, there can be a leak via the pressure relief valve - usually from a bit of copper pipe coming of the outside wall - for various reasons. But those leaks tend to have bigger, more frequent pressure drops.)
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Old 18-02-2013, 00:24
curvybabes
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There might more than one leak! I top up the pressure in my friend's house once or twice a week. There are three leaks that I know of, one of them about one drop a minute. But they are also variable. However, until a couple of weeks ago, I'd only known about two.

(Sometimes, there can be a leak via the pressure relief valve - usually from a bit of copper pipe coming of the outside wall - for various reasons. But those leaks tend to have bigger, more frequent pressure drops.)
I hope ive not got more than one leak
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Old 18-02-2013, 01:19
woodbush
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Boiler is 2 years old. Once a month the boiler pressure needs to be increased. Checked the system completley and there are no leaks.

does a condensate boiler work this way or could there be another fault with it. No problem getting someone in to fix it but you hear stories of people being taken for a ride. Just after some ideas as what could be causing this problem



Thanks
It's a condensing boiler as they all are now. There should be no leaks. My boiler is 8 years old and I rarely top it up.

It could be the expansion vessel need re-pressurising, my freind had the same problem..

I suggest you take a contract out with BG and after a month you can request a call out. They will even replace the boiler if less than 7 years old. The cheapest is 9 per month.

http://www.britishgas.co.uk/products...ecare-100.html
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Old 18-02-2013, 08:59
BinCat
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Get it serviced, the engineer should be able to tell you if it's OK. they're supposed to be serviced every year anyway for safety aren't they?
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