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Apology, but been extreamly busy at work and so no time to do anyting except keep topping up water to pressure the system. So, in a nut shell, I guess I've either got a leak in the system or that the expansion tank is buggered. I guess I'll call in a plumber to replace the tank, since I'm...

OILMAN, I tried the first option of regenerating the expansion space in the megaflo, as per instructions.......HW and CH were fine and the pressure upto 1.4bar stabalised whilst the system was on full blast. But, when I turned the system down the pressure droped to 0.8bar and this morning...

Thanks OILMAN Thanks for the tip. I'm going to try that and see what happens. If all goes well and pressure still drops.....could it then be the expansion tank? call for plumber then I guess or is it easy to fix? Cheers Hush :?

OILMAN Sorry, but another thing is that I had let the water in couple of times (around 2 months ago) well beyond 3 bar. I am now wiser after leaning from the site. Also lot of water was discharging (2-3 months back) for about 5 minutes, and this use to happen periodically. I havn't noticed...

Thanks for the tip Oilman. Since then, I called a local pumbers who keeps charging me £81 for every visit and tells me that It might be the expansion vessel! I also noticed, that the discharge from the PRV near megaflo tank is around 1drop/20sec when system is not on and around 1...

I apologise, but this is my first post. Around 6 months ago, noticed loss of pressure and occasionally observed water spilling out from discharge outlet, which is somewhat not as frequent as before. Now, I'm having to keep topping up the water everyday, as the pressure goes down to almost...