Water presure in heating

lookitsme

Greetings I'm looking for some advice, I have low water pressure in my hot water tank so when the heating comes on the pipes gurgle. When this happens i have to top up the water in the hot press, before i top it up the dial reads 0, i bring it up to 1.5 this takes 20 odd seconds. So where does the water go. I don't have any viable leeks or dampness. What should i do, i don't mind topping it up every so often but is it the start of a bigger problem.

heinbloed

No one knows without seing the system. Contact a plumber.

maradonas

or a heating engineer with technical plumbing abilities !!

DGOBS

Come on, give the guy a break, he recommended a plumber and your still jumping on him.

You could have a leak anywhere, even in the coil of the cylinder, and you wouldn't see it at all

Yes topping up your system constantly is is really bad, as the fresh water will promote corrosion, destroying your boiler and everything else within time.

Outkast_IRE

DGOBS wrote: »

Come on, give the guy a break, he recommended a plumber and your still jumping on him.

You could have a leak anywhere, even in the coil of the cylinder, and you wouldn't see it at all

Yes topping up your system constantly is is really bad, as the fresh water will promote corrosion, destroying your boiler and everything else within time.

correct me if im wrong here, but if the leak was in the coil of the cylinder the guage on the heating system would still show some pressure as it would balance with whatever the head of water is in the cold cistern.

First thing i always do in this situation is go around to every rad and check the valves and visible pipework for any sign of a leak or dampness by the floor etc.

After that you could try getting a plumber to put leak sealer in , it does work sometimes.

DGOBS

Sure wold, but if he's putting 1.5bar in, it would drop to at least 0.2 bar.
I was just pointing out that the leak my not be obvious, cold be from the safey valve outside etc.

heinbloed

A frequent poster is looking for correction

correct me if im wrong here, but if the leak was in the coil of the cylinder the guage on the heating system would still show some pressure as it would balance with whatever the head of water is in the cold cistern.

Since ordinary pressurised CH systems are joined with an 'interactive pressure neutralising device' - Irish: the expansion barrel - this pressure in the system will be dilluted down to zero. As the OP has experienced.
The water at the pressurised and now leaking side will be forced out of the system by the pressure provided by the system.
Until the pressure of the leaking part of the (formerly) sealed system will be the same as the pressure of the open part of the system.

'Communicating pipes' - is that the correct expression?

PS
It might need a heating engineer in the " local " professional environment to solve the OP's problem (smiley)

Outkast_IRE

heinbloed wrote: »

A frequent poster is looking for correction




Since ordinary pressurised CH systems are joined with an 'interactive pressure neutralising device' - Irish: the expansion barrel - this pressure in the system will be dilluted down to zero. As the OP has experienced.
The water at the pressurised and now leaking side will be forced out of the system by the pressure provided by the system.
Until the pressure of the leaking part of the (formerly) sealed system will be the same as the pressure of the open part of the system.

'Communicating pipes' - is that the correct expression?

PS
It might need a heating engineer in the " local " professional environment to solve the OP's problem (smiley)

Thats the basis for what im saying , but the point is its probably not a leak in the coil if the pressure gauage is dropping to Zero, if it was a coil leak it would stop as DGBOS said around .2bar or something similar.

Thats why i would be looking elsewhere for the leak initially such as checking rad valves etc. Or checking if there is a safety pipe and is there a drip out of it .

dossir

The expansion vessel may need to be repressurised unless the diaphragm is burst

jolo

Hi,

I've just posted in this thread
http://www.boards.ie/vbulletin/showthread.php?t=2056653560
regarding a slight leak in the heat exchanger of the boiler but this thread also rings bells and

this quote

Yes topping up your system constantly is is really bad, as the fresh water will promote corrosion, destroying your boiler and everything else within time.

might explain where we're at now. The pressure has been dropping for a long long time.

How and where can I find a good Heating Engineer? In the Clare/Tipperary/Limerick area?