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Thank you very much Tony. I will look at Intergas. Is contamination the reason why system boilers are not normally used on open systems? That and possibly system pressure?

Is it possible to use a system boiler in an open vented system? The system is in Ukraine. Currently there is a 25kW gas boiler (cirsa 1950) and unused solid fuel boiler on an open vented wystem. It is large (4") single pipe system, with large cast rads (about 350 Lts total). There is over 32'...

Thanks for your reply. I have done as you suggested. I must admit I haven't had it serviced. Whatever the problem, it may be because I haven't had it serviced. I just forgot it was there, never a problem. But I will put something in place now. Thanks again.

I have a Vokera Vision wich is very noisy when it reaches temperature. From discussion with Vokera, I suspect that it may be noise from the flu collector. I have cleaned the condense trap, which may have been blocked (lots of scale). There is a continual drip of condensate. Can I investigate any...

FiremanT, Owner thank you. I had planned many aspects of new building work, some of which require moving the existing gas supply within the house. The job has now been completed. The gas installer could not understand why there was an extra test point which he has removed. Thank you for your...

Yes, there is a test point on the meter. Sorry I had not seen it before. Begs the question why there is one inside the house? I will post a photo when I next visit the house. Thank you.

I am trying to plan for new domestic gas installation. There is an existing supply and meter outside the house withg a fiberglass lift off cover. There is a test point within the house close to the meter. To facilitate some building work, it would be convenient to have the test point...