Water leaks out of the 10 bar domestic safety valve on my glowworm 30 ci plus boiler when it has been on for a while, its running like a tap out of the pipe that is outside the house and the boiler is running continually trying to heat up the water thats escaping.Central heating side is still working ok and there isn't any significant increase in domestic water pressure so I'm not sure why this is happening, anyone got any ideas.
water leaking out of domestic safety valve outlet. glowworm
- Thread starter valdez
- Start date
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Disconnect the filling loop! 
Why disconnect the filling loop when all that does is fill the central heating system, also, on my boiler its and integral part of the boiler and not a piece of flexible pipe as on a normal system, and its the domestic hot water safety valve thats letting water through it, why would it do this unless the pressure was too high or the water was too hot and neither are the case.
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No, not heating a cylinder at all, i thought the whole idea of a combi boiler was to do away with a cylinder and have instant hot water. I will check the pressure reducing valve but i'm not convinced the safety valve is faulty as most of the time it doesn't let water throught it, it seems to be mainly in the evening and even then not always.
Its the domestic hot water safety valve that is leaking, not the heating safety valve. The water is running because the domestic hot water has to be on all the time otherwise i wouldn't get any hot water out of my taps, the filling loop and filling valve only services the central heating which has to be independent of the domestic hot water otherwise i would have all kinds of gunk coming out of my taps from the central heating system.
Sorry, thought i had answered it in the last question, yes, the filling valve is turned off, but as i have said above that isn't filling the domestic hot water so on or off it makes no difference.
Are you extracting the michael
No, i'm not extracting the michael, tell me why i'm wrong?
Where is this safety valve? Please dont tell me its in the boiler!
The boiler schematic is here on page 13 of this pdf file, the safety valve is number 24. http://www.glow-worm.co.uk/products/pdf/discontinued/boilers/30ciplus.pdf
sounds similar to me
no safety valve but
when dhw turned off pressure goes over 10 bar(gauge max)
no expansion on system when this was happening so had 2 blowouts on flexi hoses
instlled 8 litre exp and seems to have cured pressure prob although boiler runs on a little longer to fill vessel
no safety valve but
when dhw turned off pressure goes over 10 bar(gauge max)
no expansion on system when this was happening so had 2 blowouts on flexi hoses
instlled 8 litre exp and seems to have cured pressure prob although boiler runs on a little longer to fill vessel
check the date of valdez last post.FFS
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