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New UPS3 pump in and working now. Still no fricking flow!! It must be something in the boiler !!??? there are just two rads on the mini system I've created with clear pipes between them.

What is, and where would I find, the Dumball anti gravity circulation valve? I have again had the old 15/60 pump in pieces since oilhead gave me doubts about my previous check... I took it off the housing by unscrewing the four bolts, wired it up and had it spinning seemingly with no issues, I...

This is useful information. I have searched and searched on google and even ebay to try and find an image showing the heat exchanger part and ideally it's insides. So it doesn't have small or narrow waterways where debris could become lodged and cause it to block up?

Yes, I've had the pump out and it's fine, impeller connected and it spins freely. Valves? there are isolation valves on either side of the pump, they are fully open. I have blown through all of the pipes between the radiators and the boiler with hose pipe and various Speedfit setups! and water...

Thanks oilhead. Yes that corresponds with what I worked out so that's good. I've got it all back together again tonight after flushing the, now, only two rads on the system and the interconnecting pipework. No large lumps of sludge (dead mice) appeared just lots of black lightweight sludge...

I've been googling for hours and can only find the Camray 5 manual, and endless fake links to dodgy 'exe' downloads masquerading as the Camray 3 manual. The plumbing in my new (but very old) house is total nightmare to work out, pipes running everywhere and add on bits all over. I would like...

Does anyone have a copy they could send me please. Thanks James