balancing one pipe systems are really hard to do but they can be doneYou can try turning the lockshield vavles down on the hot rads to force more flow to the farthest rads.
I had a 1 pipe system in my place but it was rotten and sludged up so I've replaced it all now, not a small job!
i can tell you now thats wrong rad near a plug is not a good thing neither is having flexi hosses on it eitherSo I've topped up the water level and switched the heating on and so far so good ....we'll see if it stays ok and not go over pressure....the only good part is that because I didn't have the heating on, we put an oil filled heater on in the kitchen during breakfast ...warmest we've been for ages as the kitchen rad is the last one and gets lukewarm at best!!
GAZ ...our is a one pipe system in that a single pipe runs round with the radiators on top and the in and out just from the single pipe. On a couple of rads I've put a tap in to try and force the water to go up and down rather than straight on ...it's helped a little.....see attached pic ......
We will probably be moving in the next year (I hope) so will put up with it for now (been here 10 years anyway!!).
I think "No Comment" is the only answerMorning all...just to thank you all again for the help and advice. I have just managed to check if there was any air in the expansion vessel (after realising there was a valve cap on it ) so..no pressure at all. Couldn't find a bike pump so used my compressor on a very low setting and put 15psi into it ....... this was about 15 minutes ago.....
So I've topped up the water level and switched the heating on and so far so good ....we'll see if it stays ok and not go over pressure....the only good part is that because I didn't have the heating on, we put an oil filled heater on in the kitchen during breakfast ...warmest we've been for ages as the kitchen rad is the last one and gets lukewarm at best!!
GAZ ...our is a one pipe system in that a single pipe runs round with the radiators on top and the in and out just from the single pipe. On a couple of rads I've put a tap in to try and force the water to go up and down rather than straight on ...it's helped a little.....see attached pic ......
We will probably be moving in the next year (I hope) so will put up with it for now (been here 10 years anyway!!).
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I thought the ball type isolating valves were fitted, to make it easy to 'Isolate' and remove what ever you are 'Isolating', be it radiators, taps, showers etc.A ball type isolating valve has absolutely no flow regulating characteristics and isn't the right valve for the job.
Good advice.Greenstar 24i covers quite a few boilers
If its a greenstar its likely to be modern(ish) so may involve disturbing a combustion seal, if so it needs a gas safe engineer
Precisely that. They are designed for isolation and unlike a proper regulating valve, do not have any characteristics that are suitable for regulating. i know many get used for this purpose but there are far better valves available that will make the job easier.I thought the ball type isolating valves were fitted, to make it easy to 'Isolate' and remove what ever you are 'Isolating', be it radiators, taps, showers etc.
but they also restrict and lower the flow of water going through themPrecisely that. They are designed for isolation and unlike a proper regulating valve, do not have any characteristics that are suitable for regulating. i know many get used for this purpose but there are far better valves available that will make the job easier.
A ball valve might not the the best, but its pretty good for its cost if you don't need fine, linear control. Even then, find a V-port one and its pretty linear.A ball type isolating valve has absolutely no flow regulating characteristics and isn't the right valve for the job.
That's just a full bore quarter turn isolating valve in the photo and by the screwdriver slot is nearly closed. This just makes the next rad cooler as nearly all of the water has passed through it. A properly designed and installed one pipe loop does not have any valves between the radiator connections.A ball valve might not the the best, but its pretty good for its cost if you don't need fine, linear control. Even then, find a V-port one and its pretty linear.
As do the radiator valves etc.but they also restrict and lower the flow of water going through them
as the valve is actually smaller than the size of a 15mm pipe