Recent content by b175c15t110

The power flush on Monday morning did it. It wasn't the rads, as after being on for 5 hours with downstairs rads turned off, the upstairs rads would eventually get hot top to bottom. So there was clearly a partial blockage somewhere in the upstairs pipework, or possibly in the short section...

So there "was" a bypass. I've had the floorboards up and can clearly see the pipes for a bypass, but a previous plumber/gas engineer has squashed the feed pipe flat just after it tees into the radiator to prevent flow to the bypass. A brief test this morning shows that it hasn't stopped the...

Well that's beyond my knowledge for sure. I can only find out if there is a bypass, and the heating engineer can take it from there. He's been fitting baxis for many years, so may know if there's a motorised valve etc. I will ask him when he gets back on Monday.

I'll be looking into that bypass asap, as that could easily be the answer.

Not sure what ufh is, but possibly under floor heating? If so, I don't have that. Although all of the downstairs piping does run under the floor in a well ventilated void, and no insulation on the pipes. I would assume a decent loss there. A mammoth and destructive task to retrofit insulation...

I don't know the actual temperature, but after 15 to 30 mins of running, the return pipe is hot enough that the boiler either slows down or turns off. I don't know if the boiler modulates at this point, or just turns off for a while. Not sure how "clever" it is. At this point, the downstairs...

From original post: "The boiler is a recent Baxi platinum 40kw, and the system had a chemical flush when fitted, but not a power flush." It's not the balancing. I shut all downstairs rads off completely, and the rads were still very slow (45 mins) to get hot upstairs, and they were already warm...

19 rads in total. Boiler brand new. Yes, large magna clean filter on return. Filter is clean. Not sure about a mesh filter. Will check tomorrow. Thanks.

"Carry on with the balancing." All downstairs rads are set between 1/8 and 1/4 turn on the lockshields. Hard to turn them down much more! "Is this a one pipe system" No, all radiators are on a feed and return system, so there are 2 pipes going around the whole system. I'm now looking into the...

Hi. Hoping someone can advise. My downstairs CH system is on 3 loops. First loop 3 rads, Second loop 7 rads, Third loop 3 rads. All loops return via the main 22mm pipe to the boiler. However, the second loop also feeds 6 upstairs rads, making a total of 13 rads on that loop. The upstairs rads...