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Attached is a picture of their recommendations. I'm reading it as clean boiler and 1 Rad, am I misunderstanding it?

Attached is a picture of their recommendations. I'm reading it as clean boiler and 1 Rad, am I misunderstanding it?

A Vaillant engineer has diagnosed the cause of my boiler noise to be the heat exchanger, which is what I suspected. They have taken a water sample and Fernox report says I need to first clean the system with Fernox F3 cleaner, then clean the boiler and 1 rad only with Fernox DS40, then treat the...

I have a British gas rs2 mechanical roomstat which for me is in the wrong place. I'm wanting to replace this with a salus rt310rf wireless roomstat, will this be ok. Should have added the current roomstat switches my central heating circulation pump on and off depending on temp setting, only if...

Hi Ian we've spoken before. Mine is Flowmax 180 thermal store and vaillant ecotec plus 418 boiler.

My ground floor rads are on drop downs (I think that's the correct terminology) so I drained each rad individually each time I drained so they all had a good flush out. The noise is literally only there when the boiler is on max flame once flame reduces it goes instantly?

Sorry I'm not helping but I have a similar problem that I've tried to eliminate but after 3weeks it's come back, not as bad quieter than before. It only does it when the boiler fires up and is what I'm calling max flame once the set temp is reached or somewhere near the flame backs off and the...

I don't think I had a sludge problem, I had no issues with cold spots in rads and system flush wasn't really dirty but as I was doing the work I put it in for the required period. I have micro bore on my heating side so powerflush not recommended. System has always had inhibitor added, boiler...

I was getting a noise when the boiler was on full flame, initial start up until temp setting was reached or if high demand, shower running heating on. It sounded worse if I slowed the circulation pump down and slightly better when I turned it up, sounded like a rumbling but only when on full...

Just thought I'd update and say thanks to all who helped. Drained system after circulating x400 for 2 weeks. Filled, circulated and drained another 4 times. Removed 4 seized ball valves and replaced with gate valves. Removed head from grundfos British gas multi head pump for inspection but...

Possibly changing thermal store circulation pump , depending on what I find. Narrowed down to two. Wilo yonos pico 25 1-6 130 £82 or Grundfos ups3 15 50/65 130 £104 Any advice or experience of either would be helpful before I buy. Thanks.

So any of the above will do? They do have other features but I wouldn't need them just constant flow which is one of the settings. There's a bit of difference in price so I'm looking for advice on which are best wilo, grundfos etc. I can't find a replacement head for my existing pump so may have...

Any advice on pumps? As you know mine circulates the thermal store constantly so quiet and efficient is good, some of these have modulation or auto settings but as its only circulating the tank not sure they will be any advantage to me, probably just need constant speed setting, on that pump...

I'm going to be tackling this job on Friday. System will have had sentinel x400 in for 2 weeks by then. Draining down, refilling and flushing x4 before filling and dosing. Still uncertain if thermal store circulation pump is partly to blame for the noise when boiler on max heat, having removed...

Thanks for that. I would be fitting them on my hot water ch system, either side of my thermal store circulation pump and my ch circulation pump.

This is why I asked. I was getting gate valves then read a thread with the information below on those valves so got confused. I still think gate valves are the way forward, as long as they are operated 6 monthly and not wound wide open to a stop they should last and if they leak from the...

Do you have a link I can only find these below? What makes them better?

Won't cause me any problems with restricted flow or increased dp with these valves?

Which valves are best, I've read conflicting reviews, gate valves better, full flow ball valves best. One thing I am wondering is these valves are fitted to allow a pump change without draining system but all posts I've read say they leaked or didn't seat properly when required so drained down...

Me neither I was just going off what I read and seemed easier to stop than the CH pump but it does get more use. I'm not draining and flushing until next week just didn't want to spend a fortune on the inhibitor x4 bottles then find the pumps not upto scratch. Bit of a dilema!