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[Sir Tigger KC]

Tunnie you say your on the 5th floor.  Where does your pressure relief valve vent to? Does it go straight through the wall?  Can you see it out of a window?  If you can, keep an eye on it to see if it's dripping...    Might be that the spring has got weak in the pressure relief valve... 

[feeutfo]

Sounds familiar. Any popping or banging from the boiler, any bubbling in the pipes?

[tunnie]

I sometimes read these threads and do wonder if im doing the right thing by planning on swapping out my 30yo boiler for a condensing combi. 

When I bought my flat, it was my first experience of a combi boiler. I really do like way it works, hot water on demand, no need to turn on water heater or spark it up 30 mins before you want water. Or having it on a timer, then getting up earlier one day and getting no water, its just always there.

Keep a close eye on the pressure over the coming weeks, in case there is a small, as yet undetected, leak, or if the expansion chamber is fubar...  ...and resolve any issues before it becomes a bigger problem. Esp if it means Mrs Tunnie has a cold shower - I can imagine her suffering a sense of humour failure under such conditions in this weather

Yup, going to keep a close eye on it 

Got some points though for fixing it 

I was quoted similar call out prices as yourself tunnie

They were insane, strongly considering a course!

Tunnie you say your on the 5th floor.  Where does your pressure relief valve vent to? Does it go straight through the wall?  Can you see it out of a window?  If you can, keep an eye on it to see if it's dripping...    Might be that the spring has got weak in the pressure relief valve... 

Yes I can see it out of the window, will keep an eye on it, did'nt think of that 

Sounds familiar. Any popping or banging from the boiler, any bubbling in the pipes?

Not really, its fairly silent when its running 

[feeutfo]

I've just been through all this with mine. Old boiler kettling. Fit new boiler, still kettling. Fit press pack(pressure vessel) in place of the water tank and stop cock. Gauge dropping, pressure lost, boiler makes a racket as there's no water in it then cuts out. No heat or water.

Reason for pressure loss, leaking heating pipes under the concrete floor. These had been leaking since the house was built. The pressure vessel just exaggerated the problem, and helped us find the leak effectively.

The 1.5 bar comes from mains water pressure on our system, and is topped up manually by allowing water pressure back in via a tap.

I have learned that a leak on hot water pipes is quite hard to find, as the hot pipes evaporate the leak away, and passing pumped water can pull air in.

[feeutfo]

Should add, other possible is failed valve from pressure vessel to over flow. Keep an eye on the over flow from the boiler.

[tunnie]

How long did it take to loose pressure? I'm going to keep a close eye on it 

[feeutfo]

At its worsed, it was loosing all it's 1.5 bar in 24hours. We have fixed the worsed leak, but it's still loosing 0.3bar over 48hours.

Having said that, ours needs topping up 3 or 4 times a year anyway as part of normal use. I don't know if yours will top up automatically with water, or you have to do it manually and that's the only problem your seeing...?

[tunnie]

At its worsed, it was loosing all it's 1.5 bar in 24hours. We have fixed the worsed leak, but it's still loosing 0.3bar over 48hours.

Having said that, ours needs topping up 3 or 4 times a year anyway as part of normal use. I don't know if yours will top up automatically with water, or you have to do it manually and that's the only problem your seeing...?

I don't think it does, I just opened valve manually to let in water. Its been at least 6 months since it was last done, so hoping its just that.

[feeutfo]

At its worsed, it was loosing all it's 1.5 bar in 24hours. We have fixed the worsed leak, but it's still loosing 0.3bar over 48hours.

Having said that, ours needs topping up 3 or 4 times a year anyway as part of normal use. I don't know if yours will top up automatically with water, or you have to do it manually and that's the only problem your seeing...?

I don't think it does, I just opened valve manually to let in water. Its been at least 6 months since it was last done, so hoping its just that.

sounds likely  

[Marks DTM Calib]

Water regs dont allow for auto fill as that would require a permanent mains cold water connection. 

[TheBoy]

I think I'd rather eat my testicles than have a combi.

I have only ever seen one usablable combi for a 4 bedroom house, and that my bro's. Stands floor to ceiling, and is massive. But does allow 2 taps on at the same time.

[tunnie]

I think I'd rather eat my testicles than have a combi.

I have only ever seen one usablable combi for a 4 bedroom house, and that my bro's. Stands floor to ceiling, and is massive. But does allow 2 taps on at the same time.

I'd agree for a house, but a flat its fine   

[TheBoy]

I think I'd rather eat my testicles than have a combi.

I have only ever seen one usablable combi for a 4 bedroom house, and that my bro's. Stands floor to ceiling, and is massive. But does allow 2 taps on at the same time.

I'd agree for a house, but a flat its fine   

Yeah, agreed, combi's have a place. Well suited to single occupancy accomodation...  ...as long as you remember not to get in shower when washing machine is on

[Sir Tigger KC]

Sounds familiar. Any popping or banging from the boiler, any bubbling in the pipes?

Gotta love a noisy old boiler!!! 

[feeutfo]

Sounds familiar. Any popping or banging from the boiler, any bubbling in the pipes?

Gotta love a noisy old boiler!!! 

it tells you when it's working.